Iam not sure which one is it guys or girls

If a baby uses 15 diapers in 2 days, how many diapers will the baby use in a year?

!! 10 ! a westbound jet leaves central airport traveling 635 miles per hour. at the same time, an eastbound plane departs at 325 miles per hour. in how many hours will the planes be 1900 miles apart?

What is the slope of the line that contains the points (-2,1) and (0,-3)