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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.

If 3 3/4 lb. of candy costs 20.25 how much would 1lb. of candy cost

The graph represents f(x)=[x]+3. what is f(-2.2)?