Solve the inequality. Give the solution set in both interval and graph forms

Find the average speed of a rabbit that runs a distance of 22 m in a time of 1.8 s .

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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%)