1. A watch with a regular price of $85.00 is now on sale with a discount of 20%. Calculate the sale price of this watch. Describe your strategy for finding the sale price

Pls , the question is in the picture!

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)

Which statement accurately describes how to perform a 90° clockwise rotation of point a (1,4) around the origin?