Groups of students are hiking from mile markers 2, 6 and 8, to meet at the waterfall located at mile marker 5. A. How can you use the mile marker to determine the number of miles each group of students needs to hike to the waterfall?

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%)