Simplify the expression shown below: In(e^3/x^4), where x > 0
a. 3-4 lnx
b. 3/x^4
c. 3e/4
d.3-x^4

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%)