The function h(x)=-0.3x^2+7.5x models the path a basketball travels, where x is the horizontal distance traveled (in feet) and h(x) is the height (in feet). Write an expression (do not solve) for how far away is the ball (in the x direction) when the basketball is at its highest point.

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 =