William bought a new sweater at the store when they were having a 45%, off sale. if the regular price of the sweater was $19, how much did william pay with the discount?

Which graph represents the following piecewise defined function?

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)

Find the amplitude of a sinusoidal function that models this temperature variation