Train a leaves westtown and travels 50mph toward smithville 330 miles away at the same time train b leaves smithville at 60mph toward westtown. after how many hours do the two trains meet?

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?

What is the rate for one gallon of gasoline

Which word in the sentence below is an interrogative pronoun? who is picking us up from school? whousisfrom