(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Postal charges are $.25 for the first ounce and $.20 for each additional ounce or fraction thereof. Let c be the cost function for mailing a letter weighing w ounces.

a) Is c a continuous function? What is the domain?

b) What is c(1.9)? c(2.01)? c(2.89)?

c) Graph the function c.

2. Relevant equations

3. The attempt at a solution

For a I got:

No. The domain is all real numbers > 0.

B is where I get stuck, I understand the question it's just I cant get what the integer function would be..

C I could do once I have b..

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# Limits and Continuity

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