How does the area of a circle change if the if the radius is multiplied by factor of n where n is a whole number?

Combine like terms7y^2 + 7(6y^2 − 8)

These question are hard can you me with answers

Mary works for a company that ships packages and must measure the size of each box that needs to be shipped. mary measures a box and finds the length is 7 inches, the width is 14 inches, and the height is 15 inches. what is the volume of the box? [type your answer as a number.]