This background is for me friend junior <3 and this one is for bre is she sees :>
and mines is nice i made it so when im editing at night i don't burn my eyes :D

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)

Write the expression as a single natural logarithm. 2 in a - 4 in y

What is the value of x in the equation7x+2y=48 when y=3