Ms. connor owns 4 hotels. the mean number of rooms is 30. which number line shows what could happen to the mean if she buys two new hotels, one with 45 rooms and another with 51 rooms?

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%)