There was ⅓ of a roll of streamers left, but Mrs. Wilson still had 6 more windows to decorate. If she wanted each window to have the same amount of streamers, how much of the roll did each window have?

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%)