Please help!! I'm super confused:(

The multiplication property of zero states that the product of any number and 0 is 0. what must be true about either a or b to make ab=0

Question 101 points)which equation in slope-intercept form represents the line that passes through (5, 1) and(-4,7)

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.