The price of an item yesterday was $120. Today, the price rose to $156.

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?

25 ! the line of best fit is h = 5a + 86. predict the height at age 16.

It says factor each expression completely 8y+48