Some of the children at a nursery arrive by car. . 40% of the children at the nursery are boys.
70% of the boys at the nursery arrive by car.
60% of the girls at the nursery arrive by car.
What is the probability that a child chosen at random from the nursery arrives by car?

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.