Need Help on this math problem. Thank you

Question

Mrs. Parker rolls dough to make an 8-inch diameter pie.



What area does the dough cover? Round to the nearest hundredth. (Use 3.14 for pi.)


?in.2

Answer 1

Here's what we know:

A_cir = πr² (Area of a circle equals pi times the radius squared)

π = 3.14

r = 1/2 * 8 = 4 (The radius is half of the diameter (which is 8 inches), so it equals 4 in.)

 

That leaves us with:

A = 3.14 * 4²

You should be able to solve from here.