Brian invests £6600 into his bank account. He receives 0.6% per year compound interest.
How much will Brian have after 6 years?
Give your answer to the nearest penny where appropriate.

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%)