1 15/8+ 1 10/8=
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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?

Evaluate the expression for the given value of the variable. 5×(h+3) for h=7

Solve for x. −3/4(x+2)=6 enter your answer in the box