Please Please Help, I only have 2 days. 50 points, and brainiliest to any valid attempt. Please show work and answer all. Thanks you so much XD Sooo many points, just please help

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 =

5x−4≥12 or 12x+5≤−4 can you with this problem

Melanie is buying a bathing suit that costs 39.99. she is given a discount at the cash register of $6.00 when she scratched 15% off on a game piece for a store promotion. what will the sale price of melanie’s bathing suit be?