7.) One gallon is 4 quarts. Kai buys 2.5 gallons of milk at the store. How many quarts of milk did Kai buy?

And explain how you got it so i can understand future problems : 3

Plzzz i beg u so much asaaaap ! what is the slope of this line? enter your answer in the box.

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?