What is the circumference of the circle if r = 3.5 feet? use 22 7 for π. a) 5.5 feet b) 11 feet c) 22 feet d) 38.5 feet

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 =