(28 divided 7 + 6 divided 3) x 1/2

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 =

For the inequality |c| < |d| to be true, which of the following must be true?

Use sigma notation to represent the following series for 9 terms.