If the radius of a circle is 5 centimeters, how long is the arc subtended by an angle measuring 60°? a) 3 5 π cm b) 5 2 π cm c) 5 3 π cm d) 5 6 π cm

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%)