A teenager who is 5 feet tall throws an object into the air. The quadratic function f(x) = -16x2 + 64x + 5 is where f(x) is the height of
the object in feet and x is the time in seconds. When will the ball
be 10 feet in the air? Round your answer to the nearest hundredth.
X=
and
GIVING

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 0 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)