The function f(t)= 15,000(0.86)' models the value , in dollars, of a used car t years after it is purchased. What is the value of r for the exponential function

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)

98 point question what is the record for most points in one

Complete the equation of the live through (-1,6) (7,-2)