An equilateral triangle is shown inside a square inside a regular pentagon inside a regular hexagon. Write an expression for the area of the shaded regions. Shaded area = area of the – area of the + area of the – area of the

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?

This is so hard and it’s for a test

True or false: the graph of y=f(bx) is a horizontal compression of the graph y=f(x) if b< 1