A window washer charges a flat fee of 31.95 plus 22.40 per hour. How much would the window washer charge for a job that took 9.5 hours to complete?

If 1 km = 0.621 miles, how many miles are in a centimeter

International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?

Given a: b and b: c, find a: b: c. write the ratio in simplest form. a: b=6: 10 and b: c=21: 33