If 2 inches equals 20 miles on a map, then how many inches will represent 120 miles

Isee the amount was $90.00 then reduced to $75.00 , what is the percent ?

Agrain trader buys the following amounts from three suppliers: 3,200 pounds, 5,100 pounds and 700 pounds. what is the total weight of his purchase?

On a string instrument, the length of a string varies inversely as the frequency of its vibrations. an 11-inch string has a frequency of 400 cylces per second. find the frequency of a 10-icnch string.