What is the difference of the polynomials?
(picture attached)
a. 2x^2
b. 2x^3 + 2x
c. x^6 + x^2
d. 2x^6 + 2x^2

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%)