cos 14° -sin 14°/ cos 14° + sin 14° = cot 59​

Answers

Answer 1
Using trigonometric identities, we can simplify the left side of the equation to get:

cos 14° - sin 14° / cos 14° + sin 14° = (cos² 76° - cos² 14°) / [sin 76° (cos 15° - sin 15° cos 76°)]

We can further simplify this to get:

(cos 62° - sin 62°) / [sin 76° (cos 15° - sin 15° cos 76°)]

Using trigonometric identities, we can simplify the right side of the equation to get:

cot 59° = cos 31° / sin 31°

Comparing the two expressions, we can see that:

cos 31° = cos 62° - sin 62°

sin 31° = sin 76° (cos 15° - sin 15° cos 76°)

Therefore, we can conclude that:

cos 14° - sin 14° / cos 14° + sin 14° = cot 59°
Answer 2

Answer:

To solve this trigonometric identity, we need to use the definitions of the trigonometric functions and some algebraic manipulation. Here's how we can do it:

cos 14° - sin 14°/ cos 14° + sin 14°

= (cos 14°/cos 14°) - (sin 14°/cos 14°)/(cos 14°/cos 14°) + (sin 14°/cos 14°) (multiplying the numerator and denominator of the second term by cos 14°)

= 1 - tan 14°/1 + tan 14° (using the definitions of cosine and sine, and dividing both terms by cos 14°)

= (1 - tan²14°)/(1 + tan 14°) (using the identity 1 + tan²θ = sec²θ)

= 1/cot 14° - cot 14° (using the definition of cotangent and simplifying the numerator)

= cot 90° - cot 14° (using the identity cot(90° - θ) = tan θ)

= cot (90° + 14°) (using the identity cot(θ + 90°) = -tan θ)

= cot 104°

Since cot(104°) = cot(180° - 76°) = -cot 76°, we can also write the final answer as -cot 76°.

Therefore, the given identity is true, and we have shown that:

cos 14° - sin 14°/ cos 14° + sin 14° = cot 59​ = -cot 76°.

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Related Questions

Find the sum of the first 8 terms of the following sequence. Round to the nearest hundredth if necessary. 20,40,80,. Using the geometric series

Answers

The sum of the first 8 terms of the sequence is 5100. Rounded to the nearest hundredth, this is 5100.00

To find the sum of the first 8 terms of the sequence 20, 40, 80,..., we need to use the geometric series formula:

S = a(1 - r^{n}) / (1 - r)

where S is the sum of the first n terms, a is the first term, r is the common ratio, and n is the number of terms.

In this case, a = 20 (the first term), r = 2 (the common ratio, since each term is twice the previous one), and n = 8 (since we want to find the sum of the first 8 terms).

So plugging these values into the formula, we get:

S = 20(1 - 2^8) / (1 - 2)
S = 20(1 - 256) / (-1)
S = 20(255)
S = 5100

Therefore, the sum of the first 8 terms of the sequence is 5100. Rounded to the nearest hundredth, this is 5100.00.

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The ratio table shows the costs for different amounts of bird seed. find the unit rate in dollars per pound. the unit rate is $ per pound​

Answers

The ratio table shows the costs for different amounts of birdseed. So, the unit rate is $2 per pound in this example.

To find the unit rate in dollars per pound, follow these steps:
1. Look at the given ratio table, which shows the costs for different amounts of bird seed.
2. Identify the cost and the corresponding amount (in pounds) of bird seed for any one row in the table.
3. Divide the cost (in dollars) by the amount (in pounds) to calculate the unit rate.

For example, if the table shows that the cost is $6 for 3 pounds of bird seed, the unit rate would be calculated as follows:

Unit rate = Cost / Amount
Unit rate = $6 / 3 pounds
Unit rate = $2 per pound
So, the unit rate is $2 per pound in this example

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The Environmental Protection Agency has determined that safe drinking water should have an average pH of 7. Water is unsafe if it deviates too far from 7 in either direction.You are testing water from a new source and randomly select 30 vials of water. The mean pH level in your sample is 6.4, which is slightly acidic.The Standard deviation of the sample is 0.5.(a) Does the data provide enough evidence at a = 0.05 level that the true mean pH of water from this source differs from 7?(b) A 95% confidence interval for the true mean pH level of the water is (6.21, 6.59). Interpret this interval.(c) Explain why the interval in part (b) is consistent with the result of the test in part (a).

Answers

a. The data provided enough evidence at a = 0.05 level that the true mean pH of water from this source differs from 7

b. A 95% confidence interval for the true mean pH level of the water is (6.21, 6.59) means  about 95% of those intervals would contain the true mean pH level.

c. The estimated mean pH level of seven is not included in the interval in section (b). This is consistent with the result of the test in part (a), which also rejects the null hypothesis that the true mean pH level is 7.

(a) To test whether the true mean pH of water from this source differs from 7, we can perform a one-sample t-test. The null hypothesis is that the true mean pH is equal to 7, and the alternative hypothesis is that the true mean pH is not equal to 7.

The test statistic can be calculated as follows:

t = (sample mean - hypothesized mean) / (sample standard deviation / sqrt(sample size))

t = (6.4 - 7) / (0.5 / sqrt(30))

t = -3.07

Using a t-table with 29 degrees of freedom at a significance level of 0.05 (two-tailed test), the critical t-value is ±2.045. Since the calculated t-value (-3.07) is outside of the critical t-value range, we can reject the null hypothesis and conclude that there is enough evidence at a = 0.05 level to suggest that the true mean pH of water from this source differs from 7.

(b) A 95% confidence interval for the true mean pH level of the water is (6.21, 6.59). This means that if we were to take many random samples of size 30 from this water source, and construct a 95% confidence interval for each sample mean pH level, then about 95% of those intervals would contain the true mean pH level.

(c) The interval in part (b) does not include the hypothesized mean pH level of 7. This is consistent with the result of the test in part (a), which also rejects the null hypothesis that the true mean pH level is 7.

The confidence interval provides additional information by giving a range of plausible values for the true mean pH level, and we can see that all of the values in this range are below 7, indicating that the water is indeed slightly acidic.

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The city is planning a concert that is expected to bring in a crowd of about


200,000 people. The concert will be held in a public park. The city planners are thinking


about the size and shape of the space that will be needed to accommodate this


number of people.


At a much smaller yet similar event, the crowd was estimated to be about


22,000 people. At this event, the crowd was confined to an area that was roughly the


shape of a right triangle with side lengths that were approximately 300 feet, 350 feet,


and 461 feet.


Determine the appropriate dimensions of a similar space with 200,000 people.


Show your work or explain your modeling.


hallar larger

Answers

The dimensions of the larger space would be roughly 300 x 350 x 461 feet multiplied by the scaling factor of 3.01. This gives dimensions of approximately 903 x 1053 x 1388 feet.

To determine the appropriate dimensions of a space that can accommodate 200,000 people, we can use the concept of similarity.

We know that the smaller event had a crowd of 22,000 people and the area was roughly a right triangle with side lengths of 300, 350, and 461 feet. We can use the ratio of the number of people to the area to find the scaling factor.

The area of the triangle is (1/2) x 300 x 350 = 52,500 square feet.
The ratio of people to area is 22,000/52,500 = 0.42 people per square foot.

To accommodate 200,000 people, we need an area of 200,000/0.42 = 476,190.5 square feet.

Assuming we maintain the same shape and proportions, we can use the area of the triangle as a guide to find the dimensions of the larger space. Let x be the scaling factor. Then:

(1/2) x (300x) x (350x) = 476,190.5
52,500x² = 476,190.5
x² = 9.05
x = 3.01

In summary, we can use the ratio of people to area to determine the appropriate dimensions of a space that can accommodate 200,000 people. By maintaining the same shape and proportions of a smaller event, we can find the scaling factor needed to determine the dimensions of the larger space.

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For Items 6-10, the height of an object, in centimeters, is modeled by the function y = 42sin (π/10 (x-h)+ 55. Determine whether each statement is always, sometimes, or never true.

6. The period of the function is 20.

7. The maximum height of the object is 55 centimeters

8. The minimum height of the object occurs when x=0

9. The graph of the function has the midline y= 55

10. The amplitude of the function is 84.

Answers

Answer:

It's fascinating to observe how the volume of different shapes can vary based on their measurements. For instance, a cylinder with a height of 6 centimeters and radius r1 has a volume of 302 cubic centimeters. Do you require further assistance?

As for the new set of instructions, please consider the following statements:

6. Sometimes true. The period of the function is determined by the formula T= 2π/b, where b is the coefficient of x in the argument of the sine function. In this case, b = π/5, so T= 10.

7. Always true. The maximum height of the object is equal to the amplitude of the function plus the vertical shift, which is 55 centimeters.

8. Sometimes true. The minimum height of the function occurs when the sine function has a value of -1, which happens at x= h-5. So, if h= 0, then x= -5, which means the statement is sometimes true depending on the value of h.

9. Always true. The midline of the function is determined by the vertical shift, which is 55 in this case.

10. Always true. The amplitude of the function is given by A= |b|, where b is the coefficient of x in the argument of the sine function. In this case, A= 42π/5, which simplifies to 84.

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Find the surface area of the triangular prism. The base of the prism is an isosceles triangle.

Answers

The surface area of the triangular prism is 3152 square cm if the  base of the prism is an isosceles triangle.

What exactly is a triangular prism?

When a prism has three rectangular sides and two triangular bases, the prism is said to be triangular. It's a pentahedron. A right triangular prism has two faces and three rectangular sides. Bases refers to the triangle faces, whereas laterals refers to the rectangular sides.

We have a triangular prism, is showing in the picture:

Here  a = 25

b = 25

c = 14

h = 44

The surface area of the triangular prism is given by

  A = ah + bh + ch + 1/2√-a⁴ + 2(ab)² + 2(ac)² + -b⁴ + 2(bc)² - c⁴

  Plug all the values in the formula we get:

A = 3152 square cm

Thus, the surface area of the triangular prism is 3152 square cm if the  base of the prism is an isosceles triangle.

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Leo’s family needs to cross a bridge. Because it is night, they must have a flashlight to cross. Dad takes one minute, mother three minutes, Leo six minutes, brother eight minutes, grandpa 12 minutes, and a maximum of two people can cross the bridge at a time, there is only one flashlight, and the power can only support 30 minutes. The bridge crossing time is calculated according to the slow person. How can Leo’s family cross the bridge before the flashlight runs out?



PLEASE FAST IM RUNNING OUT OF TIME ILL GIVE BRAINLIEST

Answers

We know that they cannot exceed 30 minutes, they should not waste any time and must move quickly during each crossing.

To ensure that Leo's family crosses the bridge before the flashlight runs out, they should follow these steps:
1. Dad and Mom should cross the bridge together, which will take 3 minutes (because the slowest person is Mom, who takes 3 minutes).
2. Dad should return to the starting point, which will take 1 minute.
3. Leo and Brother should then cross the bridge together, which will take 8 minutes (because the slowest person is Brother, who takes 8 minutes).
4. Mom should return to the starting point, which will take 3 minutes.
5. Dad and Grandpa should then cross the bridge together, which will take 12 minutes (because the slowest person is Grandpa, who takes 12 minutes).
6. Dad should return to the starting point, which will take 1 minute.
7. Finally, Dad and Mom should cross the bridge together, which will take 3 minutes (because the slowest person is Mom, who takes 3 minutes).

Adding up all the minutes taken, it will be: 3+1+8+3+12+1+3=31 minutes. However, since they cannot exceed 30 minutes, they should not waste any time and must move quickly during each crossing.

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Evaluate the following limit. Use l'Hôpital's Rule when it is convenient and applicable. lim sin 3 X00 lim 3 Xod in ) - 0 () (Type an exact answer.) X

Answers

The overall limit is undefined as the the second limit is undefined

The given limit is of the indeterminate form 0/0 and hence we can apply l'Hôpital's Rule to evaluate it.

Applying l'Hôpital's Rule, we get:

lim sin(3x) / (3x) = lim [cos(3x) * 3] / 3 = cos(3x)

Now, we need to evaluate lim (3x)/(1 - cos(x)) as x approaches 0.

Again, this limit is of the indeterminate form 0/0, so we can apply l'Hôpital's Rule once again:

lim (3x)/(1 - cos(x)) = lim (3)/(sin(x)) = 3/0 (which is undefined)

Since the second limit is undefined, the overall limit is also undefined.

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How much will the monthly payment be for a new car priced at $24,530 if the current finance rate is 36 months at 3. 16%? You will finance the 8% TT&L and make a 20% down payment

Answers

The monthly payment for a new car priced at $24,530 with the given terms is $630.15.


Calculating the down payment:

20% of $24,530

= 0.20 × 24,530

= $4,906.


Subtracting the down payment from the car price:

= $24,530 - $4,906

= $19,624 (amount to finance).

Adding the 8% TT&L (tax, title, and license) to the amount to finance:

  8% of $24,530

= 0.08 × 24,530

= $1,962.40.

So, the total amount to finance

= $19,624 + $1,962.40

= $21,586.40.

Converting the annual interest rate of 3.16% to a decimal:

  3.16% / 100

= 0.0316.

Calculating the monthly interest rate:

 0.0316 / 12

= 0.002633.

Calculating the total number of payments: 36 months.


Using the monthly payment formula:

P = (PV * r * (1 + r)^n) / ((1 + r)^n - 1),

where P is the monthly payment,

           PV is the present value or amount to finance,

          r is the monthly interest rate, and

          n is the total number of payments.
Now, pluggin  in the values:

P = ($21,586.40 × 0.002633 × (1 + 0.002633)³⁶) / ((1 + 0.002633)³⁶ - 1)

= $630.15.

The monthly payment for the new car will be approximately $630.15.

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Find the length of the entire perimeter of the region inside r = 7 sin Ф but outside r = 2.

Answers

To find the length of the entire perimeter of the region inside r = 7 sin Ф but outside r = 2, we first need to determine the boundaries of the region.

The equation r = 7 sin Ф represents a curve that forms a flower-like shape, while the equation r = 2 represents a circle with radius 2.

To find the region inside r = 7 sin Ф but outside r = 2, we need to find the points where these two curves intersect.

Setting the two equations equal to each other, we get:

7 sin Ф = 2

Solving for sin Ф, we get:

sin Ф = 2/7

Using a calculator, we can find the two values of Ф that satisfy this equation to be approximately 0.304 and 2.837 radians.

Thus, the region inside r = 7 sin Ф but outside r = 2 is bounded by the angles 0.304 and 2.837 radians.

To find the length of the entire perimeter of this region, we need to integrate the length element around this curve:

L = ∫(from 0.304 to 2.837) √[r² + (dr/dФ)²] dФ

Using the equation r = 7 sin Ф, we can substitute and simplify the expression under the square root:

L = ∫(from 0.304 to 2.837) √[49sin²(Ф) + 49cos²(Ф)] dФ

L = ∫(from 0.304 to 2.837) 7 dФ

L = 7(2.837 - 0.304)

L = 16.1

Therefore, the length of the entire perimeter of the region inside r = 7 sin Ф but outside r = 2 is approximately 16.1 units.
To find the length of the entire perimeter of the region inside r = 7 sin Ф but outside r = 2, we must first identify the points of intersection between the two curves.

1. Set the equations equal to each other:
7 sin Ф = 2

2. Solve for Ф:
sin Ф = 2/7
Ф = arcsin(2/7)

Now, we must determine the length of the perimeter of each curve in the region of interest:

3. Length of the perimeter of r = 7 sin Ф (half of the curve, since it's within the specified region):
For a polar curve r = f(Ф), the arc length L is calculated using the formula L = ∫√(r² + (dr/dФ)²) dФ.

In this case, f(Ф) = 7 sin Ф, so dr/dФ = 7 cos Ф. Integrating over the range [0, arcsin(2/7)], we can find the half-length of this curve.

4. Length of the perimeter of r = 2 (portion of the circle outside the region):
Since we know the points of intersection from step 2, we can find the central angle of the circular segment using Ф. The central angle is 2 * arcsin(2/7), and the circumference of the circle is 2π * 2. The portion of the perimeter is given by the ratio of the central angle to 2π, multiplied by the circumference.

Finally, add the lengths obtained in steps 3 and 4 to get the total length of the entire perimeter of the region.

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What is the vertex of the graph of the equation Y=3x2( to the second power) +6x+1
A.(-1,-2)
B.(-1, 10)
C.(1, -2)
D.(1, 10)

Answers

Answer: To find the vertex of the graph of the equation Y=3x^2+6x+1, we can use the formula:

x = -b/2a

where a = 3 and b = 6, which are the coefficients of the x^2 and x terms, respectively.

x = -6/(2 x 3) = -1

Substituting x = -1 into the equation, we get:

Y = 3(-1)^2 + 6(-1) + 1 = -2

Therefore, the vertex of the graph is (-1, -2), so the answer is A. (-1,-2).

Step-by-step explanation:

A candlemaker prices one set of scented candles at $10 and sells an average of 200 sets each week. He finds that when he reduces the price


by $1, he then sells 50 more candle sets each week. A function can be used to model the relationship between the candlemaker's weekly


revenue, R(x) after xone-dollar decreases in price.


R(x)


R(x)


6,000+


4,000+


6,000+


1,000+


2. 000


2,000+


2,000


2,000+


-4,000


4,000


6,000+


-6,000


Graph w


R(x)


Graph X


R(x)


6,000+


1,000+


6,000+


1,000+


2,000+


2,000


-2,000+


2,000


1,000+


4,000


-6,000


6,000


Graph Y


Graph Z


This situation can be modeled by the equation y =


x +


x +


and by graph


Next

Answers

The equation of demand of candle sticks can be modeled by

y = 14 - 0.02x while the revenue function will be xy = 14x - 0.02x².

Here we are given the information that

200 candles are sold for $10 and,

250 candles are sold for $9

Let the Price be y while the Quantity sold be x

Hence, by one unit decrease in price P, the quantity sold is increased by 50 units.

Here the slope of the function will be

(10 - 9)/(200 - 250)

= - 1/50

= - 0,02

Now we will use the formula of the equation of a straight line

(y - y₁) = m(x - x₁)

where, m is the slope and x₁ , y₁ are some point on line

Hence we get

(y - 10) = -0.02(x - 200)

or, y - 10 = -0.02x + 4

or, y = 14 - 0.02x

The revenue function will be xy = 14x - 0.02x²

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Correct Question

A candlemaker prices one set of scented candles at $10 and sells an average of 200 sets each week. he finds that when he reduces the price by $1, he then sells 50 more candle sets each week. a function can be used to model the relationship between the candlemaker's weekly revenue, r(x), after one-dollar decrease in price. this situation can be modeled by the equation y =

Find the probability that a randomly selected point within the circle falls in the white area. R=4 cm 2. 5 cm 3 cm 3 cm [?]% Round to the nearest tenth of a percent. ​

Answers

The probability is approximately 45.4% (rounded to the nearest tenth of a percent).

To find the probability that a randomly selected point within the circle falls in the white area, we need to find the area of the white region and divide it by the total area of the circle.

The total area of the circle is:

A = πr² = π(4 cm)² = 16π cm²

The area of the white region can be found by subtracting the area of the two semicircles from the area of the circle:

White area = A - 2(1/2π(2.5 cm)²) = 16π - 2(4.375π) = 7.25π cm²

So, the probability that a randomly selected point within the circle falls in the white area is:

P(white area) = (white area)/(total area) = (7.25π)/(16π) ≈ 45.4%

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What is the slope of the line?​

Answers

To find slope you will use rise over run

Jason wants to earn at least $250 each week working during the


summer.


Jason earns $6. 00 an hour babysitting.


Jason earns $7. 75 an hour working at a store.


He can work no more than 40 hours each week.


Let b equal hours of babysitting, and s equal hours working at the


store.


Which system of inequalities models the constraints?


O 6. 00b + 7. 755 2 250


b +5 s 40


O 6. 00b + 7. 75s 250


b +5 s 40


O 6. 000 + 7. 75s 40


b + s 250


O 6. 00b + 7. 75s 2 40


b + s 250

Answers

Answer:

The correct system of inequalities that models the constraints is:

6.00b + 7.75s ≥ 250

b + s ≤ 40

Explanation:

The first inequality represents the requirement that Jason needs to earn at least $250 each week. The earnings from babysitting are $6.00 per hour, and the earnings from working at the store are $7.75 per hour.

Therefore, the total earnings from both jobs can be represented by the expression 6.00b + 7.75s. This expression must be greater than or equal to $250, hence the first inequality.

The second inequality represents the constraint that Jason can work no more than 40 hours each week. The variables b and s represent the number of hours worked babysitting and working at the store, respectively.

The sum of these hours must be less than or equal to 40, hence the second inequality.

Therefore, the correct system of inequalities is:

6.00b + 7.75s ≥ 250

b + s ≤ 40

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The function f(t)=350(1. 2)^{365t}f(t)=350(1. 2)


365t


represents the change in a quantity over t years. What does the constant 1. 2 reveal about the rate of change of the quantity?

Answers

The constant 1.2 in the function represents the rate of change of the quantity per year.

Specifically, it represents the factor by which the quantity grows or decays over a year.

Since 1.2 is greater than 1, the function describes an exponential growth, where the quantity is multiplied by 1.2 each year.

For example, after one year, the quantity is multiplied by 1.2, after two years it is multiplied by 1.2 squared, and so on.

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(PLEASE HELP + POINTS)


Select the correct graph.


Smith's Produce sells packages of pre-cut vegetables. The company has a tolerance level of less than or equal to y grams for a 250-gram


package. Which graph could be used to determine the variance levels that would result in a package of vegetables being rejected because of


its weight, X?



(Picture of graphs)

Answers

The answer of the given question based on the graph could be used to determine the variance levels that would result in a package of vegetables is histogram.

To determine the variance levels that would result in a package of vegetables being rejected because of its weight, X, consider the following:

1. The company has a tolerance level of less than or equal to y grams for a 250-gram package. This means that the graph must represent a relationship between the weight of the package (X) and the tolerance level (y).
2. Since the package is rejected if it weighs more than the allowed tolerance, the graph should show that as the weight (X) increases, the acceptance range decreases (y decreases).
3. The graph should ideally have a boundary line that represents the maximum tolerance level (y). Any points above this line would represent rejected packages.

Based on these criteria, you should select the graph that best represents this relationship between the weight of the package (X) and the tolerance level (y), where packages with a weight exceeding the tolerance level are rejected.

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PLS HELP! and actually answer the question please

Answers

Step-by-step explanation:

First start with the graph of    y = | x|

  then shift it RIGHT one unit

         | x -1 |

  then shift it DOWN one unit

  y=   |x-1| -1

   

find the exact area of a square with a diagonal of 8 inches

Answers

Answer:

(8/√2)^2 = 64/2 = 32 square inches

What type of angles are 3 and 6



A. Alternate interior angles

B. Alternate exterior angles

C. Supplementary angles

D. Vertical angles

Answers

B. Alternate Exterior Angles

Find the missing side lengths. leave your answers as radicals in simplest form. show your work to support your answer.

Answers

The value of the missing side lengths a and b of the right angles triangle are 2 and √2 respectively.

A right-angled triangle's other angle must be 45 degrees because the base angle is that number. The third angle in a triangle must be 90 degrees since the sum of the triangle's three angles is 180 degrees.

Using trigonometric ratios, we know that,

sin(45) = 2√2/a and,

cos(45) = b/a.

Simplifying, we get,

a = 2√2/sin(45)

= 2√2/√2

= 2 and,

b = a cos(45)

= 2 cos(45)

= √2.

Therefore, the value of a is 2 and the value of b is √2.

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Evaluate the line integral, where C is the given
curve.
C
y3ds,
C: x =
t3, y =
t, 0 ≤ t ≤ 5
Please provide the right answer.

Answers

Unfortunately, this integral doesn't have a simple closed-form solution. However, you can use numerical methods or software like Wolfram Alpha or a graphing calculator to approximate the value of the integral.

We have:

y = t and ds = sqrt(9t^4 + 1) dt

So, the line integral becomes:

∫C y^3 ds = ∫0^5 (t^3)(sqrt(9t^4 + 1)) dt

Using the substitution u = 9t^4 + 1, we get du/dt = 36t^3, which means dt = du/36t^3. Also, when t = 0, u = 1 and when t = 5, u = 1126.

Substituting these values and simplifying, we get:

∫C y^3 ds = (1/36) ∫1^1126 (u-1/4)(1/2) du
= (1/72) [(u-1)^2 u^(1/2)]_1^1126
= (1/72) [(1125)^2 (1126^(1/2)) - (1)^2 (1^(1/2))]

= 3555.89 (approx)

Therefore, the line integral is approximately equal to 3555.89.
To evaluate the line integral along the curve C with the given parameterization x = t^3 and y = t for 0 ≤ t ≤ 5, we need to find the integral of y^3ds. First, we need to find the derivative of the parameterization with respect to t:

dx/dt = 3t^2
dy/dt = 1

Now, we can find the differential arc length ds, which is given by the formula:

ds = √((dx/dt)^2 + (dy/dt)^2) dt

ds = √((3t^2)^2 + (1)^2) dt
ds = √(9t^4 + 1) dt

Next, substitute the parameterization of y in terms of t (y = t) into the integral:

∫(y^3 ds) = ∫(t^3 √(9t^4 + 1)) dt, with limits 0 to 5.

Now, evaluate the integral:

∫(t^3 √(9t^4 + 1)) dt from 0 to 5.

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What is the value of x log3 x=4

Answers

Answer:

x=81

Step-by-step explanation:

Rewrite log_3 (x)=4 in exponential form using the definition of a logarithm. If x and b are positive real numbers and b≠1, then log_b(x)=y is equivalent to b^y=x.

Rewrite the equation as x=3^4

Raise 3 to the power of 4 

x=81

Area of parallelograms, quadrilaterals and polygons - tutorial - part 2. level f
ft
what is the area of the first triangle?


1 ft
1ft
1ft
3ft
4ft

Answers

The area of the first triangle is 0 square feet.

To find the area of the first triangle with the given side lengths of 1 ft, 3 ft, and 4 ft, you can use Heron's formula.

Calculate the semi-perimeter (s) of the triangle:
s = (a + b + c) / 2
where a, b, and c are the side lengths of the triangle.
s = (1 + 3 + 4) / 2 = 8 / 2 = 4 ft

Apply Heron's formula to find the area (A) of the triangle:
A = √(s * (s - a) * (s - b) * (s - c))
A = √(4 * (4 - 1) * (4 - 3) * (4 - 4))
A = √(4 * 3 * 1 * 0)
A = √0 = 0

The area of the first triangle is 0 square feet. This means that the given side lengths do not form a valid triangle, as two sides' lengths (1 ft and 3 ft) do not add up to be greater than the length of the third side (4 ft).

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please help me answer this (can give brainliest)

Answers

a) The graph of the given lines is as attached

b) The area of the enclosed triangle is: 8 square units

How to graph linear equations?

The general form of expression of linear equations in slope intercept form is expressed as:

y = mx + c

where:

m is slope

c is y-intercept

We are given the equations as:

y = x + 5

y = 5

x = 4

The graph of these three linear equations is as shown in the attached file

2) The area of the given triangle enclosed by the three lines is gotten from the formula:

A = ¹/₂ * b * h

where:

A is area

b is base

h is height

Thus:

A = ¹/₂ * 4 * 4

A = 8 square units

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The radius of a circle is 7 centimeters. What is the circumference. Round the answer to the nearest hundredth

Answers

Answer:

43.96 cm

Step-by-step explanation:

Given

Radius ( r ) = 7 cm

To find : Circumference of Circle

Formula

Circumference of Circle = 2πr

Note

The Value of π = 3.14

Circumference of Circle

= 2πr

= 2 × 3.14 × 7

= 43.96 cm

Answer:

Not Rounded: 43.9822971503

Rounded: 44

Step-by-step explanation:

r= radius

2[tex]\pi[/tex]r

2[tex]\pi[/tex](7)

= 43.9822971503

What is the volume, in cubic centimeters, of a cylinder with a height of 5 cm and a base radius of 10 cm, to the nearest tenths place?

Answers

The volume of the cylinder is approximately 1570.8 cubic centimeters, rounded to the nearest tenth.

A cylinder is a three-dimensional object with two congruent circular bases that are parallel to each other. The volume of a cylinder can be calculated using the formula V = πr²h, where V is the volume, r is the radius of the base, and h is the height of the cylinder.

In this problem, we are given that the height of the cylinder is 5 centimeters and the radius of the base is 10 centimeters. By substituting these values into the formula, we get:

V = π x 10² x 5

V = 500π

To calculate the volume of the cylinder, we can use an approximation for the value of pi. Taking pi to be approximately 3.14, we can calculate the volume as follows:

V ≈ 500 x 3.14

V ≈ 1570.8

Therefore, the volume of the cylinder to the nearest tenths place is approximately 1570.8 cubic centimeters.

It is important to note that the answer is an approximation since pi is an irrational number with an infinite number of decimal places. However, rounding to the nearest tenths place provides a reasonable level of precision for this calculation.

In summary, the volume of the cylinder is 1570.8 cubic centimeters, and the calculation is based on the given values and the formula for the volume of a cylinder.

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PLEASE HELP ASAP WILL GIVE BRAINLIEST


Lizzie came up with a divisibility test for a certain number m≠1: Break a positive integer n into two-digit chunks, starting from the ones place. (For example, the number 354764 would break into the two-digit chunks 35, 47, and 64) Find the alternating sum of these two-digit numbers, by adding the first number, subtracting the second, adding the third, and so on. (In our example, this alternating sum would be ) Find m and show that this is indeed a divisibility test for m (by showing that n is divisible by m if and only if the result of this process is divisible by m )

Answers

The value of m is 11, and the divisibility test states that n is divisible by 11 if and only if the alternating sum of its two-digit chunks is divisible by 11.

How to prove the divisibility test?

Let's consider the given divisibility test proposed by Lizzie. The process involves breaking a positive integer, n, into two-digit chunks and finding the alternating sum of these chunks. The alternating sum is obtained by adding the first number, subtracting the second, adding the third, and so on.

To find the value of m that makes this a divisibility test, we need to analyze the properties of this test. Let's assume that n is divisible by m.

When n is divisible by m, each two-digit chunk in n will also be divisible by m. This means that the alternating sum of these chunks will also be by m since adding or subtracting multiples of m will not change its divisibility.

Conversely, if the alternating sum of the two-digit chunks is divisible by m, it implies that each chunk is divisible by m. Therefore, if the chunks are divisible by m, the original number n will also be divisible by m.

Hence, this process indeed serves as a divisibility test for m, where n is divisible by m if and only if the result of the alternating sum of the two-digit chunks is divisible by m.

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One tire manufacturer claims that his tires last an average of 44000 miles with a standard deviation of 7650 miles. A random sample of 120 of his tires is taken. What is the probability that the average of this sample of tires will last longer than 45000 miles

Answers

The probability of a randomly selected tire from this sample having a lifespan greater than 45,000 miles is approximately 0.0639 or 6.39%.

We can use the central limit theorem to approximate the distribution of the sample mean.

In this case, the population mean is 44,000 miles and the population standard deviation is 7,650 miles. We are taking a sample of 120 tires, so the standard deviation of the sample mean is:

σ/√n = 7,650/√120 = 698.68

To find the probability that the sample mean will be longer than 45,000 miles, we need to standardize the sample mean using the formula:

z = (x - μ) / (σ / √n)

where x is the sample mean, μ is the population mean, σ is the population standard deviation, and n is the sample size.

Plugging in the values, we get:

z = (45,000 - 44,000) / (7,650 / √120) = 1.527

We can then look up the probability corresponding to a z-score of 1.527 in a standard normal distribution table or using a calculator. The probability of a randomly selected tire from this sample having a lifespan greater than 45,000 miles is approximately 0.0639 or 6.39%.

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Question 11 Σ Determine whether the integral is divergent or convergent. If it is convergent, evaluate it. If it diverges to infinity, state your answer as "oo" (without the quotation marks). If it diverges to negative infinity, state your answer as "-00". If it diverges without being infinity or negative infinity, state your answer as "DNE". 10 10 dc 2 6

Answers

The given integral is ∫₁₀ (10/(x-2)) dx.

The given integral is divergent and the answer is "oo".

To see why the integral is divergent, we can use the following limit comparison test:

∫₁₀ (10/(x-2)) dx ~ ∫₁₀ (1/x) dx, as x → 2.

The symbol "~" means "is asymptotic to". We can use this comparison because as x approaches 2 from the right, the function 10/(x-2) approaches positive infinity.

Now, we know that the integral ∫₁₀ (1/x) dx diverges because the improper integral of 1/x from 1 to infinity diverges. Therefore, by the limit comparison test, the original integral is also divergent.

Hence, the given integral ∫₁₀ (10/(x-2)) dx is divergent, and the answer is "oo".

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