Final answer:
To find out how much Beth will make if she sells 20 cookies, we can set up a proportion using the given information and solve for the missing variable.
Step-by-step explanation:
To find out how much Beth will make if she sells 20 cookies, we can set up a proportion using the given information. We are told that Beth is selling 14 cookies for $35, so we can set up the following proportion:
14 cookies / $35 = 20 cookies / x
To solve for x, we can cross multiply and solve the resulting equation:
14x = 20 * $35
14x = $700
x = $700 / 14
x = $50
Therefore, if Beth sells 20 cookies, she will make $50.