Nichole tried to evaluate (-z)3 where (-z) = -3.
(-z)3

a) =(−(−3))3
b) =(3)3
c) =27

find nichole's mistake

*p. s this is coming from khan academy, the lesson is equations with square roots & cube roots and it is my last question to get right. if i get it right i will pass this test. plz give me the right answer*

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)