What is the sum of 1
2
+
1
4
? Use the fraction strip to HELP?

A.
2
8
B.
2
6
C.
4
8
D.
6
8

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%)