3 pencils cost $0.45. What is the cost per pencil?

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?

Solve 30% of what = 60 step by step

What is a rule for determining possible values of a variable in a inequality