Afirecracker shoots up from a hill 145 feet high with an initial speed of 80 feet per second. using the formula h(t) = −16t^2 + vt + s, approximately how long will it take the firecracker to hit the ground?

Abag contains 3 red marbles, 2 blue marbles, and 2 green marbles. one marble is picked, then another marble. assume that the selections are made with replacement. a) find the probability of picking two red marbles with replacement. b) find the probability of picking a red marble and a blue marble. assume the selections are made without replacement. c) find the probability of picking two red marbles without replacement. d) find the probability of picking a red marble and a blue marble without replacement.