Find the factors and zeros of 6x2 + 8x - 28 = 2x2 + 4?
a) 2(x + 4)(x + 2); {-4, -2}
b) 4(x + 4)(x - 2); {-4, 2}
c) 4(x - 4)(x + 2); {4, -2}
d) 4(x - 4)(x - 2); {4, 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 =