If elephant grass grows 2 1/4 inches a day, how many inches will it grow in 9 days?

Find the number of positive three-digit even integers whose digits are among 9, 8, 7,5, 3, and 1.

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?

Which number line correctly shows 0.8 + 0.3?