Students in a math class recorded the number of text messages they received the previous day. How many students received at least 10 messages?

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?

The pyramid below was dissected by a horizontal plane which shape describes the pyramid horizontal cross section

Find the missing factor. write your answer inexponential form.9^2=9^4×