You and your friend join the gym the registration fee is $30 in the monthly membership is $20 if the total bill for you and your friend is $420 how many months did you pay for

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)

Which expression is equivalent to -12(3x-3/4)

Put the following steps for calculating net worth in the correct order