Question

Rob is making donuts to sell at a fundraiser. he has 9 pounds of butter and his recipe calls for 1/2 of butter per 1.5 dozen donuts 1 pound of butter is 2 cups and how many cups of butter will have left over after making 34 dozen donuts?

a. 4 cups
b. 6 cups
c. 8 cups
d. 10 cups

Answer 1

Rob will need 22.67 cups of butter to make 34 dozen donuts. Therefore, he will not have enough butter left over to have any cups left.

Step-by-step explanation:

To find the answer, we first need to determine how many cups of butter are used for each dozen donuts.

The recipe calls for 1/2 pound of butter per 1.5 dozen donuts.

Since 1 pound of butter is equal to 2 cups, 1/2 pound of butter is equal to 1 cup.

Therefore, for each 1.5 dozen donuts, 1 cup of butter is used.

Next, we need to calculate how many cups of butter are needed to make 34 dozen donuts. Since 1 cup of butter is used for each 1.5 dozen donuts, we can set up a proportion:

1 cup / 1.5 dozen = x cups / 34 dozen

Cross-multiplying, we get:

x = (1 cup * 34 dozen) / 1.5 dozen

Simplifying, we get:

x = 34/1.5

x = 22.67 cups

Therefore, Rob will need 22.67 cups of butter to make 34 dozen donuts.

Subtracting this amount from the initial 9 pounds of butter, we can calculate the remaining amount of butter:

9 pounds * 2 cups/pound - 22.67 cups = 18 cups - 22.67 cups

= -4.67 cups

Since the value is negative, it means that Rob will not have enough butter to make 34 dozen donuts.

Therefore, the answer is none of the given choices (a. 4 cups, b. 6 cups, c. 8 cups, d. 10 cups).