The actual length of a machine is 12.25 cm. The measured length is 12.2 cm. Round answer to part (b) to the nearest hundredth of a percent. A) Find the absolute error.

B) Find the percent error.

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%)