What is the surface area of a cylinder whose radius is 3 inches and whose height is 10 inches? round to the nearest tenth. sa = 2π r2 + 2π rh a. 226.1 square inches b. 241.8 square inches c. 244.9 square inches d. 543.3 square inches

Sorry guys but as you have a small brain

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)

I’ve been trying all day to figure this puzzle out. i need the work for it aswell. it is a factoring polynomials tarsia. the image is below.