Carlos swam the perimeter of a rectangular pool seven times. if the length of the pool is 21 ft and the width of the pool is 9 ft, how many feet did carlos swim?

If f(x)=2x+2and g(x)=x^3, what is (g•f)(2)

What is the slope of a line that is perpendicular to y = 3x + 1

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)