The area of the circles are 1384.74 cm², 20601.54 cm² and 1589.625 cm²
Finding the area of each circleFrom the question, we have the following parameters that can be used in our computation:
Radii = 21 cm, 81 ft, 45/2 cm
The area of a circle is calculated as
Area = πr²
substitute the known values in the above equation, so, we have the following representation
Area = 3.14 * 21² = 1384.74
Area = 3.14 * 81² = 20601.54
Area = 3.14 * (45/2)² = 1589.625
Hence, the area of the circles are 1384.74 cm², 20601.54 cm² and 1589.625 cm²
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please help me answer this (can give brainliest)
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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A standard number cube is rolled to play a certain board game. What is the Sample Space? Use proper notation as necessary and no extra spaces.
Answer: 1.3
Step-by-step explanation:
Let z be a random variable with a standard normal distribution. Find the indicated probability. (Enter a number. Round your answer to four decimal places. )
P(z ≥ 1. 41) =
If you let z be a random variable with a standard normal distribution, the indicated probability is 0.0793. So, the probability P(z ≥ 1.41) = 0.0793
To find the probability P(z ≥ 1.41) for a standard normal distribution, you can use a Z-table or calculator to find the area to the right of z = 1.41.
Using a Z-table or calculator, you will find the value of P(z ≥ 1.41) is approximately 0.0793. So, the probability P(z ≥ 1.41) = 0.0793. Remember to round your answer to four decimal places.
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if there are 40% math's books in school library containing 1800 books in total find the number of the math's books
Answer: 720
Step-by-step explanation: 1800 x 40%
Answer:
720 math books
Step-by-step explanation:
1800×40%= 720
there are 720 math books
PLS HELP! and actually answer the question please
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
Answer:
(8/√2)^2 = 64/2 = 32 square inches
5. A salesman bought a computer from a manufacturer. The salesman then sold the computer for
$15 600 making a profit of 25%. Unfortunately, he suffered a 5% loss due to damages when
assembling
a. What was his actual profit earnings? (10 marks)
The salesman's actual profit earnings after suffering a 5% loss due to damages when assembling the computer is $14,820.
Let's first calculate the original cost price of the computer to the salesman. We know that the salesman sold the computer for $15,600 and made a profit of 25%, which means that the selling price is 125% of the cost price.
Let the cost price of the computer be x.
Selling price = 125% of cost price
$15,600 = 1.25x
Solving for x, we get:
x = $12,480
So, the salesman's cost price of the computer was $12,480.
Now, the salesman suffered a loss of 5% due to damages when assembling the computer.
Loss = 5% of cost price
Loss = 5% of $12,480
Loss = $624
So, the actual earnings of the salesman after the loss is: $15,600 - $624 = $14,820.
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5)
The population of Sanibel, Florida can
be modeled by P = 6191 · 1. 05t,
where t is the number of years since
2016. What was the population in
2016? What percent did the
population increase by each year?
The population increased by a percentage of 5%.
The population of Sanibel, Florida in 2016 can be determined using the given population model P = 6191 * 1.05^t, where t represents the number of years since 2016. To find the population in 2016, we set t to 0 since there are 0 years since 2016.
Step 1: Set t to 0 in the equation:
P = 6191 * 1.05^0
Step 2: Calculate the population P:
P = 6191 * 1
P = 6191
So, the population in Sanibel, Florida in 2016 was 6,191.
Regarding the percent population increase each year, the given model uses an exponential growth formula with a constant factor of 1.05. The factor (1.05) represents a 5% increase in the population each year.
In summary, the population in Sanibel, Florida in 2016 was 6,191, and the population increases by 5% each year. This exponential growth model demonstrates how the population continues to grow at a steady rate, contributing to the overall population increase in the area.
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At the beginning of the summer, a camp has 540 campers and 36
counselors. part a: by midsummer, an additional 0 campers join the camp. how many additional counselors are needed to keep the same ratio of campers to counselors? write a proportion and solve. part b: by the end of the summer, 2/3 of the campers plan to come back next year. how many campers can they expect back next year? write a proportion and solve. part c: how many counselors will they need next year for the estimated returning campers? write a proportion and solve.
The camp would need 24 counselors for the estimated returning campers.
Midsummer is typically around the middle of the summer season, which is usually around the end of July. In this scenario, at the beginning of the summer, there are 540 campers and 36 counselors at a camp.
Part a asks us to determine how many additional counselors are needed to maintain the same ratio of campers to counselors if 0 additional campers join the camp by midsummer.
To solve this problem, we can set up a proportion:
540 campers / 36 counselors = (540 + 0) campers / x counselors
We can simplify this proportion by cross-multiplying and solving for x:
540x = 36(540 + 0)
x = 36(540 + 0) / 540
x = 36
Therefore, the camp would need an additional 36 counselors to maintain the same ratio of campers to counselors if no additional campers joined by midsummer.
Part b asks us to determine how many campers can be expected to return the following year if 2/3 of the current campers plan to come back. We can set up a proportion for this problem as well:
2/3 (current campers) = x (expected returning campers) / 540 (current campers)
We can solve for x by cross-multiplying and simplifying:
2/3 (540) = x
x = 360
Therefore, the camp can expect around 360 campers to return the following year.
Part c asks us to determine how many counselors will be needed for the estimated returning campers. We can set up a proportion once again:
540 (current campers) / 36 (current counselors) = 360 (expected returning campers) / x (needed counselors)
We can solve for x by cross-multiplying and simplifying:
540x = 36(360)
x = 24
Therefore, the camp would need 24 counselors for the estimated returning campers.
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How much interest has accrued after one month at a rate of 15. 5%? Use the formula I=Prt. *
A $19. 24
B $18. 71
C $18. 81
The interest accrued after one month at a rate of 15.5% on a principal amount of $1,000 is $12.92.
To use the formula I=Prt to calculate the interest accrued after one month at a rate of 15.5%, we need to know the principal amount (P) and the time period (t) in years.
Assuming that the principal amount is $1,000, and the time period is one month, which is equivalent to 1/12 of a year, we can calculate the interest as follows:
[tex]I = Prt[/tex]
[tex]I[/tex] [tex]= 1000 x 0.155 x (1/12)[/tex]
[tex]I = $12.92[/tex]
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Marcia makes jewelry to sell at the artists' fair. She spends $120 to rent a stall at
the fair for the day and each piece of jewelry costs Marcia $15 in materials.
Which equation would compute the number of pieces of jewelry Marcia must sell at
the artists' fair such that the average cost per piece of jewelry would be $20?
110
The equation that can be used to compute the number of pieces of jewellery is ($120 + $15q)/q = $20 .
What is the equation?
Average cost is total cost divided by the quantity of jewellery sold.
Average cost = total cost / quantity
Total cost is the sum of fixed cost and variable cost.
Total cost = fixed cost + variable cost
The fixed cost is the cost of renting the stall. The variable cost is the cost of the materials.
Total cost = $120 + ($15 x q)
T = $120 + $15q
Average cost = ($120 + $15q)/q = $20
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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)
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:
Suppose the area of a trapezoid is 126 yd?. if the bases of the trapezoid are 17 yd and 11 yd long, what is the height?
a 4.5 yd
b. 9 yd
c. 2.25 yd
d. 18 yd
The height of the trapezoid is 9 yards. Therefore, the correct answer is option b. 9 yd.
To find the height of the trapezoid with the given area and base lengths, we will use the formula for the area of a trapezoid:
Area = (1/2) * (base1 + base2) * height
Here, the area is given as 126 square yards, base1 is 17 yards, and base2 is 11 yards. We need to find the height.
1. Substitute the given values into the formula:
126 = (1/2) * (17 + 11) * height
2. Simplify the equation:
126 = (1/2) * 28 * height
3. To isolate the height, divide both sides by (1/2) * 28:
height = 126 / ((1/2) * 28)
4. Calculate the result:
height = 126 / 14
height = 9
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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
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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If the minimum perimeter of a quadrilateral is 200cm, what is the maximum area of the quadrilateral
guesses will be reported
first correct answer gets brainliest <3
The maximum area of the quadrilateral is achieved when it is a square with a side length of 50cm, resulting in an area of 2500cm².
This is because a square has equal sides and equal angles,
resulting in the most efficient use of the perimeter to enclose the maximum area.
To see why, consider a rectangle with a perimeter of 200cm.
If the rectangle is long and thin, with one side much longer than the others,
then it will have a smaller area than a square with the same perimeter.
This is because the longer sides of the rectangle will be less effective at enclosing area than the shorter sides.
Hence, The maximum area of a quadrilateral with a minimum perimeter of 200cm is achieved when the quadrilateral is a square.
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The radius of a circle is 7 centimeters. What is the circumference. Round the answer to the nearest hundredth
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
If x=2, y=4,m=-1 and n=3, find the value of x^m+n * y^n-m/x^m-n * y^n+m
Answer:
1024
Step-by-step explanation:
I hope everything I wrote is clear, I really need to sharpen my pencil oof
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.
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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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
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 =
What type of angles are 3 and 6
A. Alternate interior angles
B. Alternate exterior angles
C. Supplementary angles
D. Vertical angles
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 )
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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Camden and violet are reading the same book. at the beginning of the month, camden was on page 18 and violet was on page 39. camden will read 11 pages per day and violet will read 8 pages per day. let c represent the page of the book that camden is on at the end of t days into the month. write an equation for each situation, in terms of t. and determine whether camden or violet is farther along in 2 days.
For Camden the equation is c = 18 + 11t and for Violet the equation is v = 39 + 8t. After 2 days, Camden will be on page 40 and Violet will be on page 55.
Let's represent the situation with two equations, one for Camden (c) and one for Violet (v), using the given information and the variable t for the number of days.
Camden:
At the beginning of the month, Camden was on page 18 and will read 11 pages per day. So, his equation will be:
c = 18 + 11t
Violet:
At the beginning of the month, Violet was on page 39 and will read 8 pages per day. So, her equation will be:
v = 39 + 8t
Now, we need to determine who is farther along in the book after 2 days. To do this, we will substitute t = 2 into both equations.
Camden's equation (c):
c = 18 + 11(2)
c = 18 + 22
c = 40
Violet's equation (v):
v = 39 + 8(2)
v = 39 + 16
v = 55
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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.
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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The price of a shirt after 25% discount is R480 calculate the original price of the shirt
discount amount= CP-Disount percentage
or,480=CP-25/100
or480×100+25 =CP
48025 is the original price of shirt
Question content area top
Part 1
A riverboat travels 69 km downstream in 3 hours. It travels 76 km upstream in 4 hours. Find the speed of the boat and the speed of the stream.
The speed of the boat is 21 km/h and the speed of the stream is 2 km/h.
PLSS HELPP!! The diagram shown is two intersecting lines. The measure of ∠2 is 29 degrees.
(a) What is the measure of ∠4? how do you know? Explain your answer in complete sentences.
(b) Suppose the measure of ∠3 can be represented by (3x - 8). What equation can be written to solve for the value of x?
(c) What is the value of x? show all work
The measure of ∠4 is 151°.
The equation that can be used to solve for the value of x is: 3x - 8 = 151°
The value of x is 53.
What is the measure of ∠4?(a) The measure of ∠4 is found as follows:
∠2 + ∠4 = 180° ( sum of angles on a straight line)
However, ∠2 = 29°
29° + ∠4 = 180°
∠4 = 180° - 29°
∠4 = 151°
(b) The equation that can be used to solve for the value of x is found as follows:
∠3 = ∠4 ( vertical angles are equal)
Substituting for ∠3 = 3x - 8 and ∠4 = 151°,
3x - 8 = 151°
(c) The value of x is detremined as follows:
3x - 8 = 151°
3x = 159°
x = 53
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A child lifts a box up from the floor. The child then carries the box with a constant speed to the other side of the room and puts the box down. How much work does he do on the box while walking across the floor at constant speed? Your answer: 0 J More than 0 J More information is needed to determine the answer
0 J. When the child carries the box at a constant speed, the net force on the box is zero because there is no acceleration. Therefore, the work done by the child on the box is zero. So, the correct option is 0 J.
To determine the amount of work done by the child while walking across the floor at a constant speed, we need to consider the following terms: work, force, and displacement.
Work is the amount of energy transferred when a force is applied over a certain distance. It is calculated as:
Work = Force x Distance x cos(θ)
where Force is the applied force, Distance is the displacement, and θ is the angle between the force and displacement vectors.
When the child carries the box with a constant speed across the room, the force applied is equal to the gravitational force acting on the box (i.e., the weight of the box). However, since the force and displacement are in different directions (the force is acting vertically, while the displacement is horizontal), the angle between the force and displacement is 90 degrees.
Now, we know that cos(90°) = 0. Thus,
Work = Force x Distance x cos(90°) = Force x Distance x 0 = 0 J
So, the work done by the child on the box while walking across the floor at constant speed is 0 J.
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Can I have help with this question, Please?
"Write an equation for the ellipse."
Center: (1, -3)
The equation of the ellipse with center (1, -3), and a semi major axis of 4, and a semi minor axis of 3 is; (x - 1)²/4² + (y + 3)²/3²
What is the standard form of the equation of an ellipse?The standard form equation of an ellipse can be presented as follows;
(x - h)²/a² + (y - k)²/b² = 1
Where;
(h, k) = The coordinates of the center of the ellipse.
The length of the semi major axis = a
Length of the semi minor axis = b
The center of the specified ellipse is; (h, k) = (1, -3)
The semi major axis = 4
The length of the semi minor axis = 3
The equation of the ellipse is therefore;
(x - 1)²/4² + (y - (-3))²/3² = 1
(x - 1)²/4² + (y + 3)²/3² = 1
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What is the value of x log3 x=4
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
Determine if the expression zx^3/9-x^3 is a polynomial or not. if it is a polynomial, state the type and degree of the polynomial.
This expression is not a polynomial, and it doesn't have a type or degree.
The expression zx^3/9-x^3 can be simplified as:
zx^3/(9-x^3)
This expression is not a polynomial because it contains a variable (x) in the denominator, which makes it a rational expression.
A polynomial is an expression of one or more terms involving only constants and variables raised to positive integer powers, with no variables in the denominators.
Therefore, this expression is not a polynomial, and it doesn't have a type or degree.
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