Need help in math ASAP

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 =

How do the definitions, properties, and postulates you've learned about line segments, parallel lines, and angles to define the shapes of polygons

When a valve is open 281 gallons of water go through it in one hour the number of gallons that would go through in 94 hours is