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a. How many floors are between the seventh and fifteenth floors?
What is the opposite of -|-1| so what is the opposite of -1? It's 1!!! Hope this helped!
A. Independent variable: number of rubber stamps n sold. Dependent variable: F(n), the total sales.
B. Only whole numbers. It is impossible to have negative and/or fractional stamps.
C. F(n) = $4.95n, which is 4.95 times n.
So, plugin 5 for n

F(n) = $24.75