Math 10 - unit 8 final review - systems of linear equations answers

Can someone me do math because i am having a breakdown rn because i don’t get it

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 =

Shannon drove for 540 minutes. if she traveled 65 miles per hour, how many total miles did she travel?