To win the long jump, you need to jump a distance greater than 2.25m. your personal best jump is 2.1m . how much do you need to increase your personal best by to win?

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%)