Question

A sphere has a diameter of 12.5 inches. What is the surface area of the sphere? 50π in² 156.25π in² 625π in² 2604.17π in²

Answer 1

Hello!

To find the surface area of a sphere you use the equation


`A = 4 \pi r^(2)`

A is surface area
r is radius which is half the diameter

Put in the values you know


`A = 4 \pi 6.25^(2)`

Square the number


`A = 4 \pi 39.0625`

Multiply the 4 and the 39.0625


`A = 156.25 \pi`

The answer is
`B) 156.25 \pi in^(2)`

Hope this helps!