Can someone ? a cylinder has a radius of 10 cm and a height of 8 cm.

what is the volume of the cylinder?

a.
160 pi cm^3

b.
480 pi cm^3

c.
640 pi cm^3

d.
800 pi cm^3

Look at attachment. has all info needed. need

"which statement is necessarily true if bd is an altitude to the hypotenuse of right ? abc? a.) ? adb? ? bdc b.) ? adb~? bdc c.) abbc=acbd d.) ? bac? ? bdc"

The diameter of the moon is about 3500 km. approximate the surface area of the moon using the formula for the surface area of a sphere, s = 4πr2. write your answer in scientific notation.