Find the leg of a 45-45-90 right triangle with hypotenuse equal to 8. For this problem you may have a square root in your answer, So for example, ifyour answer
was 3/15, you would type 3root15.
PLEASE HELP ASAP

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)