A button has a diameter of 0.80 𝑖𝑛𝑐ℎ𝑒𝑠.

Question

What is the exact area of the button in terms of pi (𝜋)?



A=πr2
(3 points)
Responses

A. 0.16π in2
A. 0.16π in2

B. 0.40π in2
B. 0.40π in2

C. 0.64π in2
C. 0.64π in2

D. 0.80π in2

Answer 1

C. 0.64π in2

The radius of the button is half of the diameter, so the radius is 0.40 inches.

Now we can use the formula A=πr2 to find the area:

A=π(0.40)2
A=π(0.16)
A=0.16π

Therefore, the exact area of the button in terms of pi is 0.16π in2.