What is the value of 4/15÷2/3​

What is the name used to describe a graph where for some value of x, there exists 2 or more different values of y?

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?

Write the equation for the parabola that has x− intercepts (−2,0) and (4,0) and y− intercept (0,4).