3.2+Helping+the+Cook

=**//Problem 3.2//**=

23.01.2009

SM

Many important practical and mathematical applications involve comparing quantities of one kind or another; it is important to know which method to use and how we should use them.

What methods are there for comparing things?

The camp cook must buy enough ingredients for all the meals he intends to prepare for the week. One of the cook's most popular meals is spaghetti. The spaghetti recipe he uses calls for canned tomatoes. The CannedStuff store has large cans of tomatoes on sale, five cans of $4.00. The cook says he can make sauce for five to six campers from each can of tomatoes.


 * A. How many cans of tomatoes would you advise the cook to buy to make spaghetti for the 240 campers? Explain your answer.**

240\ 5 = 48. Therefore I would advise the cook to buy 48 cans of canned tomatoes.


 * B. How much would these cans of tomatoes cost altogether?**

240\ 5 = 48 * $4.00 = $192.00. Therefore these cans of tomatoes will cost $192.00 altogether. =//**Problem 3.2 Follow Up**//=


 * 1. At the EatMore grocery store, you can buy seven cans of tomatoes for $ 6.00. The cans are the same size as the cans at CanedStuff. Are the tomatoes at the Eatmore a better buy than the tomatoes at CannedStuff? Explain your answer.**

Yes tomatoes at the EatMore grocery store are a better buy than the tomatoes at the Cannedstuff grocery.

Canned Stuff EatMore $4/5 = 1.25 cans/$ 7/$6 = 1.17 cans/$ $/5 = $.80/can $6/7 = $0.86 cans/$


 * 2. Gus was trying to figure out how to think about the EatMore price of seven cans of tomatoes for $6.00. He divided 7 by 6 and got 1.16666667. He then divided 6 by 7 and got 0.85714286. What does each of these numbers mean in the context of seven cans of tomatoes for $6.00?**

In the context of seven cans of tomatoes for $6.00.

A. 7/6 (How many times bigger 7 is bigger than 6) = 7/6 = 1.17 cans/$ how many cans per $ B. 6/7 (How much bigger 7 is from 6) = $0.86 cans/$ = how many cans per $