Ight who wanna talk 14+

By what percent will the product of two numbers change, if the first number increases by 70%, while the second number decreases by 40%.

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)?