There are 12 math classrooms. Each classroom needs 2 pencil sharpeners. Each pencil sharpener costs $2.45, including tax. How much does it cost to purchase enough pencil sharpeners for the math classroom? *

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?

Find the value of x that will make l ll m

The probability that a student graduating from suburban state university has student loans to pay off after graduation is .60. if two students are randomly selected from this university, what is the probability that neither of them has student loans to pay off after graduation?