The science club charges $6.50 per car at their car wash. How many cars do they have to wash to earn at least $500?

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.

Find the value. a. 0.003 b. 0.03 c. 0.3 d. 3

Find the distance between (0,5) & (-4,2)