two liquid samples are poured into a beaker. as shown, the liquids don’t mix with each other but form layers instead. which of these statements about the two liquids is correct?

On a test the graders have a mean of 77 and a standard deviation of 8. if we can approximate the distribution of these graders by a number distribution what percent of the students. a) scores higher than 77? b) should pass the test (grades > 60)? c) should fail the test (grades < 60)?