An object is dropped from a hot-air balloon 1296 feet above the ground. the height of the object is given by h=-16(t-9)(t+9) where the height h is measured in feet, and the time t is measured in seconds. after how many seconds will the object hit the ground?

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 a. at what time does the particle reverse direction? b. when is the displacement positive? (round one decimal place and answer in interval notation) c. when is the displacement negative? (round one decimal place and answer in interval notation) d. when is the particle’s acceleration positive? (round one decimal place and answer in interval notation) e. when is the particle’s acceleration negative? (round one decimal place and answer in interval notation)

Askate shop rents roller skates as shown on the table below. which graph and function models this situation?

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