How much does it cost to do 3 loads of laundry in a laundry mat if the detergent costs $1 per load, the washer cost a $50 per load, and the dryer cost $3 per load?​

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.