PSL HELP!!! Matt runs in the park every day at the average rate of c meters per minute.

During these 20 minutes, Matt covers 2400 meters. Use this information to write an equation.

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%)