Question

9. Marianna is making a piñata that has a ball-like shape. The piñata has a surface area of 60 square feet. Use

the formula for the surface area of a sphere (S = 4m2) to find the radius of the piñata.
a
About 22.80 ft
C.
About 3.87 ft
D
la
b. About 4.78 ft
d.
About 2.19 ft
-2 6-2
1

Answer 1

D. 2.19

Explanation:

ok so the formula for the surface area of a sphere is 4
`\pi`
`r^2`

We see that 4
`\pi`
`r^2`=60.

To find the radius we must isolate r on one side of the equations.

`r^2`=60/4
`\pi`

`r^2` = 4.77464829276

r =
`√(4.77464829276)`

That is approximately equal to 2.19