Before trying this real like application problem, we recommend trying the [practice problems] first.
You make a purchase at a local hardware store, but what you've bought is too big to take home in your car.
For a small fee, you arrange to have the hardware store deliver your purchase for you. You pay for yourpurchase, plus the sales taxes, plus the fee. The taxes are 7.5% and the fee is $20.
(i) Write a function t(x) for the total, after taxes, on the purchase amount x. Write another function f(x)for the total, including the delivery fee, on the purchase amount x.
(ii) Calculate and interpret f (t(x)) and t(f(x)). Which results in a lower cost to you?
We hope that this page has somewhat increased your knowledge of functions and the different things that you can do with them. Hopefully, the composition of functions is a bit more clear than it was before. If not,
I would suggest putting this information on separate pages. It just sort of runs on and on. The pages then appear in the sidebar and make it easier to navigate around.
Comments (3)
Sarah Sabatini said
at 7:48 pm on Mar 26, 2009
I would suggest putting this information on separate pages. It just sort of runs on and on. The pages then appear in the sidebar and make it easier to navigate around.
Sarah Sabatini said
at 8:12 am on Mar 31, 2009
Sam...this looks sooooo much better!
Sarah Sabatini said
at 12:13 pm on Apr 4, 2009
I would suggest losing the music...If you go to the "walk through" on Jing, the music plays over the talking....
You don't have permission to comment on this page.