Ialso need with this. i'm sorry. i'm just not that good at math.

=38.465 cm^2

Step-by-step explanation:

This is 90 degrees of the 360 in a circle or 1/4 of a circle

The area of a circle is pi r^2

We have 1/4 of the circle, so we have 1/4 of the area

1/4 A = 1/4 pi r^2

        = 1/4 pi (7^2)

      = 1/4 pi *49

      = 1/4 (3.14) *49

    =38.465 cm^2

the answer is 844

step-by-step explanation:

it is 844 because if you add 836.50 + 7.5 you will get 844

circle area = pi * radius^2

if diameter = 10 then radius = 5

circle area = pi * 5^2

circle area = pi * 25

circle area = 78.5398163397 square units

step-by-step explanation: