Patricia drove 75 miles, then increased her speed by 25 miles per hour for 300 miles. if the second part of the drive took 3 hours longer than the first part, find her average speed.

The accompanying data represent the miles per gallon of a random sample of cars with a three-cylinder, 1.0 liter engine. (a) compute the z-score corresponding to the individual who obtained 42.342.3 miles per gallon. interpret this result.