Summarize the central ideas of the article in no more than 2 sentences

What kinds of antigens are found on the rbcs of a person with a+ blood

What are spirit and opportunity designed to do?

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)?