Question

A high-speed elevator can rise 480 feet in 30 seconds. Which expression represents the rate. In feet per minute, of the elevator?

Answer 1

You need it per minute so we have to multiply both values by 2 so 30 seconds becomes 60 seconds, otherwise known as a minute:
960ft per minute
The expression is 960*n where n is the number of minutes.

Hope this helps :)

Answer 2

The elevator rises at 960 feet per minute