You can drive 150 miles on 3/4 of a tank of gas in 3 hours. How far can you drive on one tank of gas?

You decide instead to take the train there. the train will take 135 minutes. convert this into hours and minutes.

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?

1. if events a and b are non-overlapping events, how do you find the probability that one or the other occurs? 2. what does it mean if p(a or b) equals 1?