Stella's monthly bank statement showed the following deposits and withdrawals: -−$34.71, -−$100.08, $111.62, $92.93, -−$27.27
If Stella's balance in the account was $20.1 at the beginning of the month, what was the account balance at the end of the month?

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)