Solve by any method. Asia and Mike are selling pies for a school fundraiser. Asia sold 1 apple pie and 6
blackberry pies for a total of $124. Mike sold 1 apple pie and 4 blackberry pies for a
total of $88. What is the cost each of one apple pie and one blackberry pie?

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)