Hi pls help this is timed

D) Calculate the area of a circle with a circumference of 31.4 in.

dsp73

Answer:

A ≈ 78.54

Step-by-step explanation:

Area of a circle is A=πr^2

Since you do not know r (radius) you take the formula for the circumference of a circle (C=2πr), plug in 31.4 for C, and solve for r

Now that you have the radius of 4.99746521, you round it up to 5 and solve the area formula with 5 in as r.

4 0

3 years ago

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Which statement about a dilation with a scale factor of 3 is true?

Valentin [98]

Given : dilation with a scale factor of 3

To find : Which statement is true

Solution:

A dilation is a transformation that produces an image that is the same shape as the original, but is a different size

if Dilation factor N then image Size is multiplied by N

if Scale factor < 1 then image get reduced

if scale factor > 1 then image get enlarged

scale factor = 1 lead to Same size image

Here is given that Scale factor of 3

=> image will be enlarged to 3 times the original image

Hence correct option is :

C)Each side in the pre-image is multiplied by three to find the corresponding side length in the image

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6 0

2 years ago

To estimate the height of a mountain, two students find the angle of elevation from a point (at ground level) b = 800 meters fro

Nady [450]

Answer: The height of the mountain is 1,331.4 meters (approximately)

Step-by-step explanation: From the information given, the students were standing at point b which is 800 meters from the base of the mountain and the angle of elevation from that point is 59°. Assuming that the ground is level, we can derive a right angled triangle from this set of details and hence we have triangle ABC, where angle β is the reference angle, (59 degrees), BC is the distance from the students to the base of the mountain (800 meters) and the line AC is the height of the mountain.

The line AC is the opposite, since angle B is the reference angle, therefore we shall use the trigonometric ratio as follows;

Tan β = opposite/adjacent

Tan 59 = AC/800

Tan 59 x 800 = AC

1.6643 x 800 = AC

1331.44 = AC

AC ≈ 1331.4

Therefore the height of the mountain is approximately 1,331.4 meters

6 0

3 years ago

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Find the percentage decrease when 94 decreases to 23.5

AveGali [126]

Answer:

75%

Step-by-step explanation:

(94-23.5)/(94)*100=75%

4 0

3 years ago

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The parent function f(x) = x3 and its translation, g(x), are shown on the graph.

NNADVOKAT [17]

The resulting function g(x) = (x-5)^3 + 3 shows a horizontal translation to the right by 5 units and vertical translation up by 3 units

<h3>Translation of functions</h3>

Quadratic functions are functions that has a leading degree of 2.

Given the parent function as shown:

f(x) = x^3

The resulting function g(x) = (x-5)^3 + 3 shows a horizontal translation to the right by 5 units and vertical translation up by 3 units

Learn more on translation here; brainly.com/question/12861087

#SPJ1

5 0

2 years ago