Sally can paint a room in 8 hours while it takes steve 7 hours to paint the same room. how long would it take them to paint the room if they worked together?

Acircle has a diameter will endpoints of (-2,8) and (6, 4). what is the center of the circle

The number of nails of a given length is normally distributed with a mean length of 5.00 in, and a standard deviation of 0.03 in. find the number of nails in a bag of 120 that are less than 4.94 in. long.

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.