Jennie is making popcorn. The recipe calls for 12 cup of butter, 3 tablespoons of kernels, and 1 teaspoon of salt. If she uses 10 tablespoons of kernels, how much butter does she need? Round your answer to the nearest hundredth. (1 point) Put your answer as a decimal.
We can set up a proportion to solve this problem.
The original recipe calls for 3 tablespoons of kernels and 12 cups of butter.
Let x represent the amount of butter needed if 10 tablespoons of kernels are used.
3/10 = 12/x
Cross multiplying, we get:
3x = 10 * 12
3x = 120
x = 120/3
x = 40
Therefore, Jennie needs 40 cups of butter.