Use the given circumference to approximate the surface area of the spherical object. Round the answer to the nearest square centimeter.

c = 27 cm

@Directrix

Question

Use the given circumference to approximate the surface area of the spherical object. Round the answer to the nearest square centimeter.

c = 27 cm

@Directrix

directrix · Answer

What kind of object is shown. Is it a complete sphere?

anonymous · Answer

its a bowling ball

directrix · Answer

First, use the circumference formula to find the radius of the bowling bowl.

directrix · Answer

C = 2* pi*r
27 = 2 * 3.14 * r

Solve for r.

directrix · Answer

Did you get r = 4.3 (rounded)

anonymous · Answer

i dont know how to get r

directrix · Answer

Back to the surface area of the sphere:

A = 4 * π * r² 

A = 4 * π * (4.3)²

anonymous · Answer

232

directrix · Answer

Yes, 232 to the nearest square cm

directrix · Answer

next question