Atriangle is dilated by a scale factor of 1/5 and then rotated 90 clockwise about the origin. why is the image similar to the pre-image? check all that apply.

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%)