Suppose the scores X on a test are normally distributed with a mean of 40 and a standard deviation of 10. If P(A≤X≤B)=0.8542 and A and B are symmetric about the mean, find the values of A and B.

Ametal ball with a mass of 0.028 kg is dropped from rest at a height of 1.0 meters above the ground. assuming the energy in the ball is conserved, how much kinetic energy will the ball have when it is 0.5 meters above the ground?

Apulley system is used to lift a 2,000 newton engine up a distance of 3 meters. the operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor. to lift the engine 3 meters, the operator must pull a total of 30 meters of chain through the pulley system. what is the value of di?

What is the angular momentum of the bar about the axle?