Terry burnt a total of 654 calories working out. If Terry does the same workout routine a total of 7 times over the course of the week, estimate the amount of calories that Terry will burn in a week.

Atourist boat is used for sightseeing in a nearby river. the boat travels 2.4 miles downstream and in the same amount of time, it travels 1.8 miles upstream. if the boat travels at an average speed of 21 miles per hour in the still water, find the current of the river.