8 customers entered a store over the course of 16 minutes. At what rate were the customers entering the store in customers per minute?

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?

Suppose i flip two identical coins. what is the probability that i get one head and one tail?

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 9 + 12x + 4x^2