4 2
Tyrone mixed quart of red paint with quart of yellow paint
16
16
How much paint does Tyrone have in the mbuture?
Tyrone has
quart

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%)