a ball is dropped from a balcony. the height, h meters, of the balcony above the ground t seconds after it is released is modeled by the quadratic function h(t)=78.4-4.9t^2. how far is the ball above the ground after 4s?

The graph below represents the number of dolphins in a dolphin sanctuary. select all the key features of this function.

What is the value of x in the following equation? -3x-2=2x+8

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.