A cyclist leaves his training base for a morning workout, riding at the rate of 12 mph. One hour later, her support staff leaves the base in a car going 30 mph in the same direction. How long will it take the support staff to catch up with the cyclist

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

At the beginning of year 1, carlos invests $600 at an annual compound interest rate of 4%. he makes no deposits to or withdrawals from the account. which explicit formula can be used to find the account's balance at the beginning of year 5? what is, the balance?

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.