When mack babysits, he charges $8 an hour plus bus fare. the amount mack is paid depends on the number of hours he babysits. 1. if mack babysits for 1 hour and the bus fare is $2.50, how much will mack be paid? 2. if mack babysits for 4 hours and the bus fare is $2.50, how much will mack be paid?

Astudent must have an average on five test that is greater than it equal to 80% but less than 90% to receive a final grade of b. devon's greades on the first four test were 78% 62% 91% and 80% what range if grades on the fifth test would give him a b in the course? ( assuming the highest grade is 100%)