Number a x10^is bout 8 times greater than b x10^

What is the quadric regression equation that fits these data

Somone me i want to know what 18 hours out of 24 hours in a fraction

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 =