What two simpler problems can you use to find 9 x 38?

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?

Which of the choices shown could be used to prove that aacp=abcp ?

Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)