A diagonal and a side of a parallelogram measure 80 centimeters and 25. centimeters, respectively. The angle between them measures 52 degrees. Find the length of the other diagonal. Remember that the diagonals bisect each other and opposite sides and angles of the parallelogram are equal

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)