The sum of all people age 16 who are working or actively looking for work

How do you write something in scientific notation?

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%)

Corresponding angles are a. always b. sometimes c. never congruent