The area of the larger sheet is 180 times greater than the area of the smaller sheet.
How to find the area of sheets?To determine which sheet has a larger area, Let's assume that the length of the smaller sheet of paper is l and the width of the smaller sheet is w. Then, we can express the dimensions of the larger sheet in terms of l and w as follows:
Length of larger sheet = 12l
Width of larger sheet = 15w
The area of the smaller sheet can be calculated as:
Area of smaller sheet = length × width = lw
Similarly, the area of the larger sheet can be calculated as:
Area of larger sheet = length × width = (12l) × (15w) = 180lw
To find the factor by which the area of the larger sheet is greater than the area of the smaller sheet, we can divide the area of the larger sheet by the area of the smaller sheet:
Factor = Area of larger sheet / Area of smaller sheet
Factor = (180lw) / (lw)
Simplifying the expression, we get:
Factor = 180
Therefore, the area of the larger sheet is 180 times greater than the area of the smaller sheet.
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Mr robins earns a commission on each airfare he books. At the end of the day he had booked 208. 60 worth of airfare and earned 31. 29
Mr. Robins earns a commission of 15% on the airfares he books, as he earned $31.29 on $208.60 worth of airfare bookings.
Let x be the amount of commission earned by Mr. Robins on the airfares he booked. Then, we can write the equation:
x = 15% of $208.60
Simplifying this equation, we get:
x = 0.15 x $208.60
x = $31.29
Therefore, Mr. Robins earned a commission of $31.29 on $208.60 worth of airfare bookings. To verify this, we can calculate his commission rate as:
Commission rate = Commission earned / Airfare bookings
Commission rate = $31.29 / $208.60
Commission rate = 0.15 or 15%
Hence, Mr. Robins earns a commission of 15% on the airfares he books.
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An art class cost $45 for material and $10 per class.
A. What is the rate if change?
B. What is the initial value?
C. What is the independent variable?
D. What is the dependent variable?
The rate of change is 10.
The initial value of the equation is 45
The independent variable is the number of classes.
The dependent variable is the total cost.
How to represent linear equation?The art class cost $45 for material and $10 per class. Therefore, let's represent the situation with a linear equation.
Linear equation can be represented in slope intercept form as follows:
y = mx + b
where
m = slope = rate of changeb = y-interceptTherefore,
y = 45 + 10x
where
y = total costx = number of classTherefore,
A. The rate of change is 10.
B. The initial value is 45
C. The independent variable is x(number of classes)
D. The dependent variable is total cost.
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A vase in the shape of a cylinder has a radius of 4. 3 cm and a volume of 1330. 2 cm³ what is the height of the base in centimeters round to the nearest 10th
As per the given values, the height of the vase is approximately 7.3 cm.
The radius of the vase = 4.3cm
The volume of vase = 1330. 2 cm³
Two parallel circular bases are connected by a curving surface to form the three-dimensional object known as a cylinder. There are two round flat sides, two curved edges, and one curved surface.
Using the formula for the volume of a cylinder -
V = πr²h,
where r is the radius and h is the height.
Substituting the values -
1330.2 = π(4.3)²h
1330.2 = 58.09πh
Dividing both sides by 58.09π
1330.2/58.09π = 58.09πh/58.09π
h = 7.27
= 7.3 ( After rounding)
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Consider a binomial experiment with n = 10 and p = 0.40.
In a binomial experiment with n = 10 and p = 0.40 there is a 57.0% chance of getting 5 or more successes in the 10 trials.
A binomial experiment is a statistical experiment that consists of a fixed number of independent trials, where each trial can have only two outcomes, typically called "success" or "failure." The probability of success for each trial is denoted by p, and the number of trials is denoted by n.
In this case, we are given n = 10 and p = 0.40. This means that we are conducting an experiment with 10 independent trials, where the probability of success for each trial is 0.40.
Using this information, we can answer questions about the probability of various outcomes. For example, we can calculate the probability of getting exactly 5 successes in the 10 trials:
P(X = 5) = (10 choose 5) * 0.40^5 * (1 - 0.40)⁽¹⁰⁻⁵⁾
P(X = 5) = 0.246
This means that there is a 24.6% chance of getting exactly 5 successes in the 10 trials.
We can also calculate the probability of getting 5 or more successes:
P(X >= 5) = P(X = 5) + P(X = 6) + ... + P(X = 10)
P(X >= 5) = 0.246 + 0.204 + 0.088 + 0.026 + 0.005 + 0.001
P(X >= 5) = 0.570
This means that there is a 57.0% chance of getting 5 or more successes in the 10 trials.
Overall, the binomial distribution is a useful tool for modeling situations where there are a fixed number of trials with a binary outcome, and the probability of success is known for each trial.
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Bill is walking up the steps in the Washington Monument at a rate of 30 feet per minute and Joe is walking down at the rate of 45 feet per minute. Bill is 75 feet from the bottom at the same moment that Joe is 325 feet from the bottom. Which of the following systems of equations can be used to determine the number of minutes t, from now and height, ℎ (in feet), at which they will pass each other?
The equation that can be used to determine the number of minutes t, from now and height, ℎ (in feet), at which they will pass each other is 75t = h.
What is the time taken for them to pass each other?The time taken for them to pass each other is calculated as follows;
Apply the rules of relative velocity;
(V₂ - V₁)t = h
where;
V₂ is the velocity of the BillV₁ is the velocity of the Joet is the time taken for them to meeth is the distance between them(30 ft/min - ( -45 ft/min )t = h
75t = h
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I need help Please !!!!!!!!!!!!!!!!!!!!!!!!!!
In ΔKLM, m = 17 inches, l = 44 inches and ∠L=153°. Find all possible values of ∠M, to the nearest 10th of a degree
In ΔKLM, m = 17 inches, l = 44 inches, and ∠L = 153°. The possible value of ∠M is approximately 12.3°.
In any triangle, the sum of the interior angles is always 180°. First, we can find the third angle ∠K by subtracting ∠L from 180°: 180° - 153° = 27°. Next, we use the Law of Sines to find the possible values of ∠M. The formula is:
(sin ∠M) / m = (sin ∠K) / l
Plug in the given values:
(sin ∠M) / 17 = (sin 27°) / 44
To find sin ∠M, we multiply both sides by 17:
sin ∠M = (sin 27°) * (17 / 44)
Now, find the inverse sine (arcsin) of the result:
∠M = arcsin((sin 27°) * (17 / 44))
∠M ≈ 12.3°
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using known taylor series find the first 4 nonzero terms of thetaylor series for the function f(t)=e^(t)cos(t) about 0
The first four nonzero terms are 1 + t - (t^2)/2 - (t^3)/3 + (t^4)/8
To find the first 4 nonzero terms of the Taylor series for the function f(t) = e^(t)cos(t) about 0,
we can use the known Taylor series for e^(t) and cos(t).
Taylor series:
The Taylor series for e^(t) is:
e^(t) = 1 + t + (t^2)/2! + (t^3)/3! + ...
And the Taylor series for cos(t) is:
cos(t) = 1 - (t^2)/2! + (t^4)/4! - (t^6)/6! + ...
To find the Taylor series for f(t) = e^(t)cos(t), we can multiply these two series together using the distributive property of multiplication. We get:
f(t) = (1 + t + (t^2)/2! + (t^3)/3! + ...) * (1 - (t^2)/2! + (t^4)/4! - (t^6)/6! + ...)
Expanding this out, we get:
f(t) = 1 + t - (t^2)/2 - (t^3)/3 + (t^4)/8 + (t^5)/15 - (t^6)/72 - ...
The first 4 nonzero terms of this series are:
f(t) = 1 + t - (t^2)/2 - (t^3)/3 + (t^4)/8 + ...
So, the first 4 nonzero terms of the Taylor series for f(t) = e^(t)cos(t) about 0 are:
1 + t - (t^2)/2 - (t^3)/3 + (t^4)/8
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If an inflatable ball with a volume of 96pi loses air until its radius is half of its original size, what is the new volume?
The new volume of the inflatable ball after the radius becomes half of the original one is 16π.
The original volume of the ball is given as 96π
The radius then becomes half of its original size which means if the radius of the ball is 'r' then the new radius becomes 'r/2'.
The formula for the volume of the ball is equal to, where 'r' is the radius of the ball. (4/3)π X r³
With this the original volume of the ball is
(4/3)π X r³
and the new volume of the ball after it's halved is
V₂ = (4/3)π X (r/2)³
After simplification
V₂ = (4/3)π X (r³/8)
The new volume of the ball is:
V₂ = (1/6) X πr³
So the new volume is (1/6) of the original volume. We can calculate this as
V₂ = (1/6) X 96π
= 16π
Therefore, the new volume of the inflatable ball is 16π.
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In the diagram below, congruent figures 1, 2 and 3 are drawn.
Which sequence of transformations maps figure 1 onto figure 2 and then figure 2 onto figure 3
A sequence of transformations that maps figure 1 onto figure 2 and then figure 2 onto figure 3 include the following: D. a translation followed by a rotation.
What is a translation?In Mathematics and Geometry, a translation can be defined as a type of rigid transformation which moves every point of the object in the same direction, as well as for the same distance.
This ultimately implies that, a translation is a type of rigid transformation that does not change the orientation of the original geometric figure (pre-image).
What is a rotation?In Mathematics, a rotation is a type of transformation which moves every point of the object through a number of degrees around a given point, which can either be clockwise or counterclockwise (anticlockwise) direction.
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Complete Question:
Which sequence of transformations maps figure 1 onto figure 2 and then figure 2 onto figure 3?
a reflection followed by a translation
a rotation followed by a translation
a translation followed by a reflection
a translation followed by a rotation
Rewrite the equation by completing the square
Answer:
(x-2.75)^2=4.25
Step-by-step explanation:
2x^2-11x+14=0
divide through by two
x^2-5.5x+7=0
x^2-5.5x=-7
x^2-5.5x+(-5.5/2)^2=-7+(-5.5/2)
(x-2.75)^2=4.25
$1,000 is deposited into a savings account. Interest is compounded annually. After 1 year, the value of the account is $1,020. After 2 years, the value of the account is $1,040. 40. This scenario can be represented by an exponential function of the form fx=1000bx, where fxis the amount in the savings account, and x is time in years. What is the value of b?
The value of b in the exponential function fx =1000bx is 1.02.
The problem states that interest is compounded annually, which means that the interest earned in a year is added to the principal amount at the end of the year. Using the given information, we can set up the following equations:
f₁ = 1000(1+b) = 1020
f₂ = 1000(1+b)² = 1040.40
We can solve for b by dividing the second equation by the first equation and taking the square root:
(1+b)² / (1+b) = 1040.40 / 1020
1+b = √1.02
b = 1.02 - 1 = 0.02
Therefore, the value of b is 0.02 or 2%. The exponential function is fx = 1000(1+0.02)ᵗ, where t is the time in years.
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If November 30 falls on a Sunday, then December 25 of that same year falls on which day of the week? (November has 30 days)
Step-by-step explanation:
Three weeks would be the 21st and would be Sunday too, then
22 Mon
23 Tues
24 Wed
25 Thur
Help give me an Explanation
Answer:
if the two angles are equal
we use sss therom to solve it
2ft/6ft=24ft/xft
x=(6*24)/2
=72
Identify 12P1 using factorials
a. 12!/13!
b. 12! times 11!
c. 12!/11!
d. 12!/1!
pls look at the pic
Ans. Correct option in (c) 12!/11!
we know that
the formula of nPr is n! / (n−r)!.
in this question
n = 12 and r = 1
so putting values we get ,
= 12! / (12-1)!
= 12!/11!
Directions: find the perimeter of each rectangle. be sure to include the correct unit.
The perimeter of the rectangle with a length of 10 feet and breadth of 11 feet is 42 feet.
In a rectangle, opposite sides are equal in length. So, you have two pairs of sides that are equal. The length of the two equal sides is given by l, which is 10 feet, and the length of the other two equal sides is given by b, which is 11 feet.
Therefore, to find the perimeter of the rectangle, you need to add up the length of all four sides:
Perimeter = 2(l + b)
Substituting the given values of l = 10 feet and b = 11 feet, we get:
Perimeter = 2(10 + 11) feet
Simplifying the expression inside the parentheses, we get:
Perimeter = 2(21) feet
Multiplying 2 and 21, we get:
Perimeter = 42 feet
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Complete Question:
Directions: find the perimeter of each rectangle. be sure to include the correct unit.
Where l = 10 feet and b = 11 feet.
Suppose the following set of random numbers is being used to simulate the event of a
basketball player making three free throws in a row. how should the numbers be
rearranged?
i don’t need help but in case someone needs the answer. good luck!
Option D is the correct answer as it groups the numbers into sets of five, assigns them as either a "make" or a "miss", and preserves the order of the original set.
The set of random numbers provided represents the binary outcome of a basketball player making or missing a free throw. To simulate the event of making five free throws in a row, we need to group the numbers into sets of five and assign each set as either a "make" or a "miss".
Option A simply groups the numbers into sets of five, but does not indicate whether they are a "make" or a "miss". Option B groups the numbers into sets of five and assigns them as either a "make" or a "miss", but the order of the numbers has been changed.
Option C groups the numbers into sets of five, assigns them as either a "make" or a "miss", and preserves the order of the original set.
This allows for an accurate simulation of the event of making five free throws in a row using the provided set of random numbers.
So, correct option is D.
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Complete question is:
Suppose the following set of random numbers is being used to simulate the event of a basketball player making five free throws in a row. How should the numbers be rearranged?
860583 785814 010122 337198 621549 034076 796495 978078 433330
333153
A. 860 583 785 814 010 122 337 198 621 549 034 076 796 495 978
078 433 330 333 153
B. 8605 8378 5814 0101 2233 7198 6215 4903 4076 7964 9597
8078 4333 3033 3153
C. 86058 37858 14010 12233 71986 21549 03407 67964 95978
07843 33303 33153
D. 860583 785814 010122 337198 621549 034076 796495 978078
433330 333153
Find the area of the surface. The part of the plane 4x + 3y + z = 12 that lies inside the cylinder x2 + y2 = 9
The area of the surface is [tex]\sqrt{\frac{15}{4}}\times \pi[/tex] unit square.
To find the area of the surface, we need to first find the intersection curve between the plane and the cylinder.
From the equation of the cylinder, we know that [tex]x^2 + y^2[/tex] = 9200.
We can substitute [tex]x^2 + y^2[/tex] for [tex]r^2[/tex] and rewrite the equation as [tex]r^2[/tex] = 9200.
Next, we can rewrite the equation of the plane as
z = 12 - 4x - 3y.
Now, we can substitute 12 - 4x - 3y for z in the equation [tex]r^2[/tex] = 9200, giving us:
[tex]x^2 + y^2[/tex] = 9200 - [tex](12 - 4x - 3y)^2[/tex]
Expanding and simplifying, we get:
[tex]x^2 + y^2[/tex] = [tex]16x^2 + 24xy + 9y^2 - 24x - 36y + 884[/tex]
Simplifying further, we get:
[tex]15x^2 + 24xy + 8y^2 - 24x - 36y + 884 = 0[/tex]
We can recognize this as the equation of an ellipse:
To find the area of the surface, we need to find the area of this ellipse that lies within the cylinder.
To do this, we can first find the major and minor axes of the ellipse.
We can rewrite the equation as:
[tex]15(x - \frac{4}{5})^2[/tex] + 8([tex]y[/tex] - [tex]\frac{9}{10}[/tex][tex])^{2}[/tex] = 1
So the major axis has length [tex]2/\sqrt{15}[/tex] unit and the minor axis has length [tex]\frac{2}{\sqrt{8} }[/tex] unit.
The area of the ellipse is then given by:
A = π x ([tex]\frac{1}{2}[/tex] x [tex]\frac{2}{\sqrt{15} }[/tex] x ([tex]\frac{1}{2}[/tex] x [tex]\frac{8}{\sqrt{8} }[/tex])
Simplifying we get:
A = π x ([tex]\sqrt{\frac{2}{15} }[/tex]) x ([tex]\sqrt{\frac{2}{8} }[/tex])
A = π x ([tex]\sqrt{\frac{1}{60} }[/tex])
A = [tex]\sqrt{\frac{15}{4}} \times \pi[/tex] unit square
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Sonia has a hat collection. The ratio of white hats to
blue hats in her hat collection is 10:9. Which ratio is
equivalent to 10:97
The equivalent ratio is 10:107.78
To solve this problem, we need to find a ratio that is equivalent to 10:9 but has a denominator of 97.
First, we can set up a proportion:
10/9 = x/97
To solve for x, we can cross-multiply:
10 * 97 = 9 * x
970 = 9x
To find the value of x, you divided both sides of the equation by 9, resulting in:
x = 107.78 (rounded to two decimal places)
So the equivalent ratio is 10:107.78, but since we can't have a fractional hat, we can round up to 108. Therefore, the answer is 10:108.
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Translate each problem into an equation then solve.
at a restaurant mike and his three friends decide to divide the bill evenly if each person paid 130 pesos then what was the total bill
The total bill was 520 pesos when the 4 people share the total bill and pay 130 pesos each.
Given data:
Bill paid by each = 130pesos,
Number of people = 4
We have to translate the problem into an equation. Let's assume that the total bill is x. There are a total of 4 people dividing the restaurant bill, Mike and his three friends. Since each of them paid 130 pesos, we need to multiply 130 by the total number of persons involved, we can write the equation as:
x/4 = 130
x = 4 × 130
x = 520
Therefore, the total bill was 520 pesos.
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What is 0.50 divided by 0.25
Answer:
2
Step-by-step explanation:
0.50/0.25 = 50/25
= 2
Dividing 0.50/0.25 no. is same as 50/25 when we multultiply by 100/ 100 so it is 2
ans. = 2
0.50 / 0.25
5/10 x 100/5
=2
Yellowstone national park is a popular field trip destination. this year the
senior class at high school a and the senior class at high school b both
planned trips there. the senior class at high school a rented and filled 2
vans and 8 buses with 254 students. high school b rented and filled 6
vans and 11 buses with 398 students. every van had the same number of
students in it as did the buses. find the number of students in each van and
in each bus
let x represent high school a let y represent high school b
The number of students in each bus is 15, and the number of students in each van is 28.
To find the number of students in each van and bus for the field trip to Yellowstone National Park, we can set up a system of equations using the given information. Let x represent the number of students in each van and y represent the number of students in each bus.
For high school A, we have:
2x + 8y = 254
For high school B, we have:
6x + 11y = 398
Now, we can solve this system of equations using the substitution or elimination method. We will use the elimination method:
Step 1: Multiply the first equation by 3 to make the coefficients of x the same in both equations:
6x + 24y = 762
Step 2: Subtract the second equation from the new first equation:
(6x + 24y) - (6x + 11y) = 762 - 398
13y = 364
Step 3: Divide both sides by 13 to find the value of y:
y = 364 / 13
y = 28
Now that we have the number of students in each bus, we can find the number of students in each van:
Step 4: Substitute y back into the first equation:
2x + 8(28) = 254
2x + 224 = 254
Step 5: Subtract 224 from both sides to find the value of x:
2x = 30
Step 6: Divide both sides by 2 to find x:
x = 15
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In ΔUVW, w = 5. 3 inches, v = 3. 6 inches and ∠V=32°. Find all possible values of ∠W, to the nearest 10th of a degree
The only possible value of W is:
W ≈ 71.6° to the nearest 10th of a degree.
We can use the Law of Cosines to find the angle W opposite to the side w:
cos(W) = (v^2 + w^2 - u^2) / (2vw)
cos(W) = (3.6^2 + 5.3^2 - u^2) / (2 * 3.6 * 5.3)
We can solve for u by using the Law of Cosines for the angle V:
cos(V) = (u^2 + v^2 - w^2) / (2uv)
cos(32°) = (u^2 + 3.6^2 - 5.3^2) / (2 * u * 3.6)
Simplifying the equation and solving for u, we get:
u = sqrt(3.6^2 + 5.3^2 - 2 * 3.6 * 5.3 * cos(32°)) ≈ 3.8 inches
Now we can substitute this value of u into the equation for cos(W) and solve for cos(W):
cos(W) = (3.6^2 + 5.3^2 - 3.8^2) / (2 * 3.6 * 5.3) ≈ 0.315
Taking the inverse cosine, we get:
W ≈ 71.6° or W ≈ 288.4°
Note that since the angle W is in a triangle, it must be between 0° and 180°. Therefore, the only possible value of W is:
W ≈ 71.6° to the nearest 10th of a degree.
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Marsha threw her math book off a 30 foot building. The equation of the book can be represented by the equation h=-16[tex]x^{2}[/tex]+24x+30. What is the maximum height
of Marsha's math book?
The maximum height of Marsha's math book is 36 feet.
To find the maximum height of Marsha's math book, we need to find the vertex of the parabolic equation h = [tex]-16x^2 + 24x + 30[/tex]. The vertex of a parabola is the highest or lowest point on the curve, depending on whether the parabola opens upward or downward.
To find the x-coordinate of the vertex, we can use the formula x = -b/2a, where a, b, and c are the coefficients of the quadratic equation [tex]ax^2 + bx + c[/tex]. In this case, a = -16 and b = 24, so we have:
x = -b/2a = -24/(2*(-16)) = 0.75
To find the y-coordinate of the vertex, we can substitute x = 0.75 into the equation h = [tex]-16x^2 + 24x + 30[/tex], which gives us:
h = [tex]-16(0.75)^2 + 24(0.75) + 30 = 36[/tex]
Therefore, the maximum height of Marsha's math book is 36 feet.
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a) Calculate the scale factor from shape A to shape B.
b) Find the value of t.
Give each answer as an integer or as a fraction in its simplest form.
A
5 cm
15 cm
7cm
B
12 cm
4cm
t cm
The scale factor from A to B is 5 / 4.
The value of t in the diagram is 5.6 cm.
How to find scale factor?Scale factor is the ratio between corresponding measurements of an object and a representation of that object.
Therefore, let's find the scale factor from the shape A to the shape B as follows:
5 / 4 = 15 / 12
Therefore, the scale factor is 5 / 4.
Hence, let's find the value of t in the diagram as follows:
Therefore, using the proportionality,
7 / t = 5 / 4
cross multiply
28 = 5t
divide both sides by 5
t = 28 / 5
t = 5.6 cm
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HELP!! I need the answer to pass 10th grade and im stumped D:
AB is dilated by a scale factor of 3 to form A'B'. Point O, which lies on AB, is the center of dilation.
The slope of AB is 3. The slope of A'B' is 3. A'B' passes through point O.
What is dilation in mathematics?Dilation is a process of transformation used to resize an object.
The items are enlarged or shrunk through dilation. An image that retains the original shape is created by this alteration. The size of the form does differ, though.
By multiplying the x and y coordinates of the original figure by the scale factor, you may locate locations on the dilated image when a dilation in the coordinate plane has the origin as the center of dilation.
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Pls help me with this!! 5 pts and brainliest included for the one who answers first!
Answer:
Step-by-step explanation:
Take the natural logarithm of both sides of the equation to remove the variable from the exponent. ln(e−6w)=ln(952) ln ( e - 6 w ) = ln ( 95 2 ).
A cube is sliced perpendicular to its base what is the shape of the resulting two dimensional cross-section 1. trapezoid 2. square 3.circle
If a cube is sliced perpendicular to its base, the resulting two dimensional cross-section will be a square. This is because each face of a cube is a square, and a perpendicular slice across the base will result in a square shape. A trapezoid or a circle would not result from a perpendicular slice of a cube.
When a cube is sliced perpendicular to its base, the shape of the resulting two-dimensional cross-section is a square.
Step-by-step explanation:
1. A cube has six faces, all of which are squares.
2. When you slice the cube perpendicular to its base, you are cutting it in a direction that is at a 90-degree angle to the base.
3. Since all the faces of a cube are squares, the resulting cross-section from a perpendicular slice will also be a square.
So, the correct answer is option 2, a square.
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You bought a laptop computer for $525 on the "12 months is the same as cash" plan. The terms of the plan on the contract stated that if
not paid within 12 months, you would be assessed 15. 5 percent APR for the amount on the first day of the plan
If you pay the laptop in 11 months, how much will you have paid?
a. $525
b. $540. 50
c. $595. 50
d. $606. 38
Your answer: a. $525
The "12 months is the same as cash" plan means that if you pay off the laptop within 12 months, you won't be charged any interest.
Since you plan to pay off the laptop in 11 months, which is within the 12-month period, you will not be assessed the 15.5 percent APR.
Therefore, you only need to pay the original cost of the laptop, which is $525.
To summarize, as long as you pay the full amount within the specified 12-month period, you avoid the additional interest charges. In this case, you will pay the laptop off in 11 months, so your total payment will be $525.
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For the line y=2/5x+9, what will be the angle this line makes with the x-axis?
Answer:
21.8014 degrees (to 4 decimal places)
Step-by-step explanation:
The equation y=2/5x+9 forms a certain angle with the x-axis. Note that all lines parallel to y=2/5x+9 also form the same angle with the x-axis, due to Corresponding Angles (the fact that the original line has a y-intercept of 9 is irrelevant). Therefore, we could simplify this problem slightly by considering the angle that y=2/5x (a y-intercept of 0) forms with the x-axis.
To find the angle that this line makes with the x-axis, we'll need the vertex (the origin -- let's call this point "B"), and one point on each of two rays from the vertex (Let Ray #1 be the ray from the origin directly to the right; and let Ray #2 be the ray from the origin extending into Quadrant I -- up and to the right, along the equation y=2/5x).
One point on Ray #1 is (5,0) -- it is on the positive x-axis. Call this point "A"
One point on Ray #2 is (5,2) -- inputting "5" for x, the result for y is "2" Call this point "C"
y = 2/5 * (5) = 2To find the angle (Angle ABC), observe that the three points form a right triangle (the angle CAB is a right angle because the two lines are perpendicular).
To solve for [tex]\angle ABC[/tex], recall the definition of the tangent function:
[tex]tan(\theta)=\dfrac{opposite}{adjacent}[/tex]
The Opposite side, side AC, is just the height (or the y-value) of point C. So, opposite = 2.
The Adjacent side, side BA, is just the x-coordinate of point A (and also point C). So adjacent = 5.
Substituting these known values into the tangent function, we get the following:
[tex]tan(m\angle ABC)=\dfrac{2}{5}[/tex]
To solve for the measure of angle ABC, we need to apply the inverse tangent function (also known as arctangent).
[tex]arctan(tan(m\angle ABC)=arctan(\dfrac{2}{5})[/tex]
The left side simplifies because they are inverse functions:[tex]m\angle ABC=arctan(\dfrac{2}{5})[/tex]
Calculating the right side of the equation (rounding to 4 decimal places):
[tex]m\angle ABC \approx 21.8014^{o}[/tex]
