On a standardized test with normal distributionThe mean is 75 and the standard deviation is I 1200 students took the test, approximately how many students would be expected to score between 69 and

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

F(n + 1) = f(n) – 8. if f(1) = 100, what is f(6)?

Is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis.