Anewborn baby has about 26,000,000,000 cells. an adult has about 4.94 × 10 13 cells. about how many times as many cells does an adult have than a newborn? write your estimate in standard notation.

Desmond wants to sell his car that he paid $8,000 for 2 years ago. the car depreciated, or decreased in value, at a constant rate each month over a 2-year period. if x represents the monthly depreciation amount, which expression shows how much desmond can sell his car for today? 8,000 + 24x 8,000 − 24x 8,000 + 2x 8,000 − 2x

Let r = 3. what is the value of r + 58?

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