What is the exponenet in the expression 2.528*10*10*10*10*10*10*10*10

Avegetable garden and a surrounding path are shaped like a square together are 12 ft wide. the path is 1 feet wide. if one bag of gravel covers 8 square feet, how manu bags are needed to cover the path? round your answers to the nearest tenth.

What are “like terms”? why can we only add like terms?

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?