the scale on a model train is 1 inch to 15.4 feet. One of the cars on the model train is 8 inches long. What is the length, in feet, of the actual train car?

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?

F(x)= 4x g(x) =x-1 what is f(x) divided by g(x)

Determine domain and range, largest open interval, and intervals which function is continuous.