Find the dimensions x and y of the rectangle of maximum area that can be formed from a 240-in. piece of wire.

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

Solve 3x-18=2y and 5x-6y=14 by elimination or substitution . show all !

According to the data set, where should the upper quartile line of the box plot be placed?