A repairman leans the top of an 15-ft ladder against the top of a stone wall. The base of the ladder is 4 ft from the wall. About how tall is the wall? ROUND to the nearest tenth, if necessary.

How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way

Martha is training for a duathlon, which includes biking and running. she knows that yesterday she covered a total distance of over 55.5 miles in more than than 4.5 hours of training. martha runs at a speed of 6 mph and bikes at a rate of 15.5 mph.

How many dollars more is the price of a pie than the price of a doughnut at erik’s store