Which equation shows that you can find the power of a power by finding the product of the exponents? a.(wc)d = wc + wd b. (wc)d = wc • wd c. (wc)d = wc • d d.(wc)d = wc + d

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)