Jaquel bought j pairs of jeans at 24.99 each and s shirts at 14.99 each for a total of 104.95 before taxes done right on equation to represent this situation.

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?