The height of a building is proportional to the number of floors. If the building is 135 ft with 9 floors, how many floors does this build have? How tall would the building be if it had 15 floors?

Aball is thrown from a height of 139 feet with an initial downward velocity of 15 ft/s. the ball's height h (in feet) after t seconds is given by the following. h=139-15t-16t^2 how long after the ball is thrown does it hit the ground? round your answer(s) to the nearest hundredth. (if there is more than one answer, use the "or" button.) t =

Liz had 140 pens and inna had 100 pens. after inna gave liz some pens, liz had 3 times as many pens as inna. how many pens did inna give liz?

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