Find the domain.
f(x)=x^2-81/x^2-2x-8

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)

How many ordered pairs of positive integers satisfy xy=32?

Which of the following is true about the following construction of a tangent to a circle from a point outside of the circle?