The radius of a circular hat is 3.7 inches. Find the circumference.

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?

Consider the graph of the exponential function y=3(2)×

If x = -2, then x 2-7x+10 equals a. 0 b.20 c.28