If x is 7 and the expression is x-8 what would the new number be

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)

If p(a) = 0.70 and p(b) = 0.20, then a and b are independent events if

Petes dog weighed 30 pounds it then lost 16% of it's weight how much did pete lose