Hi i have no idea what the answer is

Janet drove 300 miles in 4.5 hours. write an equation to find the rate at which she was traveling

Reduce fractions expressing probability to lowest terms. in 3,000 repetitions of an experiment, a random event occurred in 500 cases. the expected probability of this event is?

Ellen makes and sells bookmarks. she graphs the number of bookmarks sold compared to the total money earned. why is the rate of change for the function graphed to the left?