A pool charges $4 each visit, or you can buy a membership. Write and solve an inequality to find how many times a person
should use the pool so that a membership is less expensive
than paying each time. Interpret the solution.

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%)