The diameter and height of a paper cup in the shape of a cone are both 6 inches, and water is leaking out at the rate of 1/2 cubic inches per second. Find the rate at which the water level is dropping when the diameter of the surface is 2 inches.

Assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq between 80 and 120.assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq between 80 and 120.