May you please help me with my geometry.

If a baby uses 15 diapers in 2 days, how many diapers will the baby use in a year?

Shannon drove for 540 minutes. if she traveled 65 miles per hour,how many total miles did she travel?

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%)