Find all possible values for each expression. tan^-1 (-r3) PLEASE HEL LOTS OF POINTS!!! Trig a. 120° + 180°n b. 60° + 180°n c. 120° + 360°n d. 60° + 360°n

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?

Compare the following pair of numbers a and b in three ways. a. find the ratio of a to b. b. find the ratio of b to a. c. complete the sentence: a is percent of b. a=120 and b=340 a. the ratio of a to b is . b. the ratio of b to a is . c. a is nothing percent of b.

In an improper fraction, is the numerator equal to, less than, or greater than the denominator