3 years ago

The radius of a coin is 20 cm, find its surface area. (12.57 cm)

Mathematics

1 answer:

zmey [24]3 years ago

5 0

Answer:

Step-by-step explanation:

assume the coin is circular.

i think radius=2.0 cm

∵ 20 cm is too big for a coin.

i have calculated the area of both the surfaces.

area =2×πr²=2×π×2.0²=8 π=8×3.14=25.12 cm²

if only one surface then area=π×2²=4π≈12.57 cm²

You might be interested in

What is 3/4-5/10 in simplest form

Nezavi [6.7K]

3/4 is as simple as it gets 5/10- 1/2

5 0

3 years ago

jared is painting a wall in his living room that is 20 feet high and 18 feet long there are 3 windows on the wall each window is

SSSSS [86.1K]

20 high x 18 long = 360 square feet

3 windows x (4 high x 3 long) = 3 windows x 12 square feet = 36 square feet

360 - 36 (because we obviously don't paint windows) = 324

324 square feet to paint on one wall

3 0

3 years ago

Which function is graphed below?<br> WMX<br> f(x) = cos(x)<br> f(x) = cos(x)<br> (x) = sin()

snow_lady [41]

Answer: f(x)=cos(x)

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

During second period, Edna completed a grammar worksheet. She got 57 questions correct and 18 questions incorrect. What percenta

irinina [24]

57+18=75
57/75 x 100 = 76%
hope this helps! :)

5 0

2 years ago

On the graph below are three points X, Y, and Z. Write the coordinates for the given dilation. DO, 2 of X =

Svetllana [295]

<h2>Answer: Step-by-step explanation: EXPLANATION From the graph, the coordinates of Y are: We want to find the image of this point after a dilation by a scale factor of -½ about the origin. The rule for the dilation is : To find the coordinates of Y', we plug the coordinates of Y. The first choice is correct. Fraction: - 3/2, -1 </h2>

3 0

3 years ago

The radius of a coin is 20 cm, find its surface area. (12.57 cm)​

The radius of a coin is 20 cm, find its surface area. (12.57 cm)