The width of a rectangle is a units less than the length. The area of the rectangle is 42 units. What is the length, in units, of the rectangle?

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

Ataxi company charges $2.25 for the first mile and then $0.20 per mile for each additional mile, or f = $2.25 + $0.20(m - 1) where f is the fare and m is the number of miles. if juan's taxi fare was $6.05, how many miles did he travel in the taxi? if juan's taxi fare was 7.65, how many miles did he travel in taxi

How do you write something in scientific notation?