Please help! Calculus emergency! Will give medals!

Question

anonymous · Answer

Determine whether each function is continuous or discontinuous:
A) First Class Postage as a function of weight

anonymous · Answer

If you graph this using x= weight and f(x) = Postage would there be any where on the graph that is discontinuous?

anonymous · Answer

F(x)=Postage... as in the price?

anonymous · Answer

Yes

anonymous · Answer

Do I just look up a price?

anonymous · Answer

|dw:1420595730594:dw|

anonymous · Answer

I saw somewhere that because the price is rounded per certain weights that it looks like the greatest integer function... which seems to make sense. I cannot find a chart with prices, though. And that graph does not seem to represent that?

anonymous · Answer

ever sent a package?

anonymous · Answer

you cannot buy postage for say $\$\pi$  
only decimals up to the hundredth place
so is a a step function
almost all real fife functions are step functions

anonymous · Answer

|dw:1420595885906:dw|

anonymous · Answer

This si simply a drawing of how this function would look.

anonymous · Answer

|dw:1420596059384:dw|

anonymous · Answer

hmmmm

anonymous · Answer

@nelsonjedi That makes so much sense. I made a little chart that looks like this:|dw:1420596113700:dw|