Final answer:
To make 9 dozen cookies, Trish will need to multiply the amount of butter needed for one dozen, which is 1/4 cup, by 9. This results in 9/4 cups, which simplifies to 2 1/4 cups of butter.
Step-by-step explanation:
The question asks how much butter Trish needs to make 9 dozen cookies if she needs 1/4 cup of butter for one dozen. To find the total amount of butter needed for 9 dozens, we can multiply the amount of butter needed for one dozen by 9. Let's do the calculation:
1/4 cup of butter for 1 dozen cookies.
1/4 cup x 9 dozens = 9/4 cups.
9/4 cups can be simplified to 2 1/4 cups.
Therefore, Trish needs 2 1/4 cups of butter to make 9 dozen cookies. So, the correct answer is B. 2 1/4 cups.
To make 1 dozen cookies, Trish needs 1/4 cup of butter. She wants to make 9 dozen cookies. To find out how much butter she needs, we need to multiply the amount of butter for 1 dozen cookies by 9. So, 1/4 cup * 9 = 9/4 or 2 1/4 cups of butter. Therefore, Trish needs 2 1/4 cups of butter to make 9 dozen cookies.