A motorboat takes 5 hours to travel 150 miles upstream. The return trip takes 3 hours down stream. What is the rate of the boat in still water and what’s the rate of the current

Brainlest answer can you find the area and circumference of a circle given the radius or diameter? if its yes or no explain why

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 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)

Proportions in triangles solve for x