Find the length of the bold arc. Leave pi in your
answer.

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?

Ron has 8 caps and 4 of his caps are blue. thes rest of his cap are red. how many of ron's caps are red

Sara made $253 for 11 hours of work. at the same rate how much would he make for 7 hours of work?