How much energy is required to lift a 9 kg (20 lb) bag of rice from the floor to the trunk of your car located 0.9 meters above the ground? what kind of energy does the rice have when it is sitting in your trunk? to receive full credit, show all of your work in the space below.

Can (3,5 and square root 34) be sides on a right triangle?

On saturday morning, calls arrive at ticketmaster at a rate of 108 calls per hour. what is the probability of fewer than three calls in a randomly chosen minute?

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)