Question

A cookie recipe requires 3 teaspoons of baking soda for 36 cookies. If the baker would like to make 480 cookies, how much baking soda will be required?

a
13.33 teaspoons
b
12 teaspoons
c
40 teaspoons
d
108 teaspoons

Answer 1

C: 40 teaspoons.

Explanation:

Answer 2

C

Explanation:

This is a straight proportion question. Many things can be solved with a proportion. This is a good example of what is possible.

Formula

3 teaspoons x

====== =========

36 cookies 480 cookies

Notice that in the end, the units of teaspoons will be left. Multiply both sides by 480

3 teaspoons * 480 cookies

======================= = X

36 cookies

Notice the cookies cancel

3 teaspoons * 480

=============== = x

36

x = 1440/36 teaspoons.

x = 40 teaspoons

answer: C