What angles are they ?

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 =

Which is greater, 7 p 5 or 7 c 5? 7p5 7c5

Does anyone know how to solve and graph this: 4 + | a + 2 | < 7the only part i don't get is the "4 +"