Big foot has 10 pairs of socks in his drawer. each pair is a different color, and the light bulb in the room is out. how many socks does mr. foot need to pull out of the drawer to be sure that at least two of the socks match?

The tuition costs, c, for a local community college are modeled by c(h) = 250 + 200h, where h represents the number of credit hours taken. the local state university has tuition costs, s, modeled by the function s(h) = 300 + 180h. how many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.

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.

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.