What's 79,280 times 87 to the 4th power. divided by 9?

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?

Acylinder has volume 45π and radius 3. what is it’s height?

Rose bought a new hat when she was on vacation. the following formula describes the percent sales tax rose paid b=t-c/c