HDTV screens usually have a width-to-height ratio of 16:9. Which screen dimensions are in the same proportion?
26 inches by 19 inches
4 feet by 3 feet
48 centimeters by 27 centimeters
28 inches by 21 inches

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.

For the following geometric sequence, find the recursive formula. {-80, 20, -5, } i need : ')

You got a job selling magazines door-to-door. you are paid $100 per day plus $1.50 for each magazine you sell. which recursive formula models this situation?