What’s 2+2? And 3+3? And 4+4? And 5+5?

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)

If bill bought a home for $210,000 and he sold it a year later for $120,000 his percentage of loss is

Aparachutist descends 38 in 2 seconds . express the rate of the parachutists change in height as a unit rate