A ball is thrown vertically upward from the ground with an initial velocity of 109 ft/sec. Use the quadratic function h(t)=−16t2+109t to find how long it will take for the ball to reach its maximum height, and then find the maximum height. Round your answers to the nearest tenth.

If wxyz is a square, which statements must be true? plz < 3

Factor 15x^3 - 5x^2 +6x-2 by grouping. what is the resulting expression

Abag contains 5 red marbles , 6 blue marbles and 4 green marbles. susie selects a marble and returns it to the bag before selecting another marble. if susie selects a red marble 6 out of 20 times, what is the experimental probability that the next marble she selects will be a red marble ?