### Home > CAAC > Chapter 2 > Lesson 2.2.2 > Problem2-106

2-106.
1. To bake 100 of his favorite cookies, Mr. Wallis needs 350 grams of sugar. 2-106 HW eTool (Desmos). Homework Help ✎

1. How many grams of sugar would he need to bake 10 cookies? What about 20 cookies? Show all work.

2. To help him know how much sugar to use when baking cookies, Mr. Wallis started to make a table, as shown below. Copy and complete his table on your paper.

 Cookies Sugar (g) 100 350 10 20 2 1 5 700 1400

You can use a proportion to solve this problem. Once you findthe amount of sugar necessary for 10 cookies, simply multiplyby 2 to find the amount necessary for 20 cookies.

Notice that it takes 35 grams of sugar to create10 cookies. Divide 35 by 10 to get the unit rate.

Unit rate: 3.5 grams of sugar per cookie

Proportions, again, will be very useful. A sample proportion is provided below.

$\frac{100\text{ cookies}}{350\text{ grams}}=\frac{2\text{ cookies}}{x\text{ grams}}$

x = 7

Complete the table in the eTool below to solve the problem.
Click the link at right for the full version of the eTool: AC 2-106 HW eTool