Question

Find the surface area of a sphere with a radius of 10. Use 3.14 for π.
Answer

1256

1257

1258

1259

Answer 1

Sphere surface area formula:
\[A=4\pi r^2\]

Answer 2

Im not sure. so 4x10x3.14^2 or??...

Answer 3

A=4(3.14)(10)^2

Answer 4

Thanks very much for your help. I needed help with one more. Find the surface area of a cone with a slant height of 19 and a radius of 7. Use 3.14 for π.

Answer 5

Im not sure what the formula and stuff is..?

Answer 6

http://www.mathwarehouse.com/solid-geometry/cone/formula-volume-of-cone.php