The cross section area of a hole is 725cm^2. given that the area of a circle is a=3.14r^2 , find the radius of the hole.

Heena wants to measure the volume of a ball that is 24 cm across. how should she set up her equation?

Organelles are 1. responsible for producing power for the cell 2. tiny structures in the cell that carry out the cell's activities 3. responsible for digestion in the cell 4. found outside of the membrane

The electric potential a distance r from a small charge is proportional to what power of the distance from the charge? a. r^-1 b. r c. r^-2 d. r^2