HELP I’m guessing one is B I THINK

Whose conclusion is correct? choose all that apply. (two max) elijah emily edward esme

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 scale factor of two similar pyramids with volumes of 64 cubic feet and 8 cubic feet