Which is more?
1. pumping 25 gallons of gas into a truck in 3 minutes
2. filling a bathtub with 40 gallons of water in 5 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?

What is the measure of angle tvu shown in the diagram below

If 25% of y is 30, what is 60% of y?