Find the error in the calculations below, if there is one: Line (1): 8x – 4 = 2(4x + 1) - 6
Line (2): 8x - 4 = 8x + 1 - 6
Line (3): 8x - 4 = 8x – 5
Line (4): -4 = – 5
Line (5): Based on the calculations above, there are no solutions.
The error occurred from line (1) to line (2).
The error occurred from line (2) to line (3).
The error occurred from line (3) to line (4).
The error is in line (5).

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)