First-class postage in 2009 was $0.44 for the first ounce (or any fraction thereof) and $0.17 for

Question:

First-class postage in 2009 was $0.44 for the first ounce (or any fraction thereof) and $0.17 for each additional ounce (or fraction thereof) up to a maximum weight of 3.5 ounces.

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(A) Write a piecewise definition of the first-class postage P(x) for a letter weighing x ounces. 

(B) Graph P(x) for 0

(C) Is P(x) continuous at x = 2.5? At x = 3? Explain.  

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