30. Find the distance to the nearest tenth, between K(-4,
6) and R(7,-2).

a. 13.6

b. 5

C. 25

d. 185

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 =