A bicyclist rides for 4 h at a speed of 12 mph and then returns at a speed of 16 mph. Find the cyclist's average speed for the trip. (Enter your answer as a fraction.)

Can (2,3 and square root 10) be sides ona right triangle?

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.

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)