What is the price of the item after the discount?

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)

If t8 = 4 and t12 = −2, find the first three terms of the arithmetic sequence.

The candy store is having a 30% off sale. emma is going to buy $7.50 worth of candy.how much will she pay after the discount