Prove the identity, trig functions

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 graph represents the given linear function 4x+2y=3

The average length of a king cobra is 3.7 m. the record length is 1.88 m longer than the average. how long is the record holder?