Kelly has two years of milk in the refrigerator she used 1/2 L of milk in the morning with breakfast when she use the same quantities of milk at both lunch and dinner such that she used up all the milk what color quantity of the milk did she use at the dinner 

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%)