The height of an arrow that is shot upward at an initial velocity of 40 meters per second can be modeled by h = 40t- 5t^2 where h is the height in meters and t is the time in
seconds. Find the time it takes for the arrow to reach the ground.

The value, v, of kalani’s stock investments over a time period, x, can be determined using the equation v=750(0.80)^-x. what is the rate of increase or decrease associated with this account? 20% decrease 20% increase 25% decrease 25% increase