Apicture frame has a perimeter of 100 cm. its width is 4 cm less than twice its length. what is the width of the picture frame? 18 cm 32 cm 48 cm 50 cm

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 =