A manufacturer knows that their items have a lengths that are skewed right, with a mean of 16 inches, and standard deviation of 4.1 inches. If 43 items are chosen at random, what is the probability that their mean length is greater than 17 inches?

(Round answer to four decimal places)

Find two rational expressions that have the difference of 2-n/n-4

On a string instrument, the length of a string varies inversely as the frequency of its vibrations. an 11-inch string has a frequency of 400 cylces per second. find the frequency of a 10-icnch string.

Apinhole camera is made out of a light-tight box with a piece of film attached to one side and pinhole on the opposite side. the optimum diameter d(in millimeters) of the pinhole can be modeled by d=1.9[ (5.5 x 10^-4) l) ] ^1/2, where l is the length of the camera box (in millimeters). what is the optimum diameter for a pinhole camera if the camera box has a length of 10 centimeters