What is 8/9 times 1/2

Q. A circle has a radius of 21 cm. Then determine the area! EASY

photoshop1234 [79]

Hello there! :-)

The formula for finding the area of a circle is

$A=\pi r^{2}$

Notice that only the radius is squared.

We are given the radius of the circle: 21 cm.

We plug the value of r into the formula:

A=π(21)²
A=π(441)
A=1,385 cm

Hope this helps. Use the comment section to clarify your doubts.

Answered by

~A teen whose hobby is helping people with their homework

#LetItSnow

Good luck.

5 0

3 years ago

Read 2 more answers

2. Make subsets from the set below. {red, blue, pink, green}what is the answer

Andru [333]

Answer:

{} , {red}, {blue}, {pink}, {green} , {red, blue}, {red, pink}, {red, green}, {blue, pink} , {blue, green} , {pink, green}, {red, blue, pink}, {red, pink, green}, {blue, pink, green}, {red, blue, green}, {red, blue, pink, green}

Step-by-step explanation:

Given set is:

{red, blue, pink, green}

First of all, we have to calculate the number of subsets

In the given set,

n = 4

So the number of subsets will be: 2^4 = 16

The subsets are:

{} , {red}, {blue}, {pink}, {green} , {red, blue}, {red, pink}, {red, green}, {blue, pink} , {blue, green} , {pink, green}, {red, blue, pink}, {red, pink, green}, {blue, pink, green}, {red, blue, green}, {red, blue, pink, green}

3 0

3 years ago

Write and solve an equation for the situation.

Brrunno [24]

Width is 10 and Length is 18
18-10=8
18+18+10+10= 56

6 0

3 years ago

The pitch of a musical note varies inversely as its wavelength. If a tone has a pitch of 440 vibrations per second and a wavelen

ExtremeBDS [4]

Answer:

660 vibrations

Step-by-step explanation:

sorry if im wrong and have a wonderful day!!!

:)

8 0

3 years ago

I need help I’ll give you points it’s urgent

nlexa [21]

Answer:

Step-by-step explanation:

Area: 28.26

Circumference: 12.56

8 0

4 years ago