9ten thousand divided by 10 in unit form and standard form

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%)

What is the domain of the of the exponential function shown below?

The image of abc after a reflection across eg is abc