The heights of 200 kindergarten students are normally distributed with a mean of 40 and a standard deviation of 1.8 inches. approximately how many students have a height between 37.3 inches and 44.5 inches?

An equation of the line tangent to y=x^3+3x^2+2 at its point of inflection is

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?

Avery’s piggy bank has 300 nickels, 450 pennies, and 150 dimes. she randomly picks three coins. each time she picks a coin, she makes a note of it and puts it back into the piggy bank before picking the next coin.