Jennie is making popcorn. The recipe calls for 1/4 of butter, 5 tablespoons of kernels, and 1 teaspoon of salt. If she uses 13 tablespoons of kernels, how much butter does she need?
If 5 tablespoons of kernels make popcorn, and Jennie needs to use 13 tablespoons of kernels, she will need (13/5)*1/4=<<13/5*1/4=0.65>>0.65 of butter. Answer: \boxed{0.65}.
To find out how much butter Jennie needs, we can use the ratio of the amount of kernels to the amount of butter.
The recipe calls for 5 tablespoons of kernels and 1/4 of butter.
So, the ratio of kernels to butter is 5 tablespoons : 1/4 of butter.
To find out how much butter Jennie needs when she uses 13 tablespoons of kernels, we need to set up a proportion.
5 tablespoons / 1/4 of butter = 13 tablespoons / x (unknown amount of butter)
Now, cross multiply and solve for x:
5 * x = 13 * 1/4
5x = 13/4
To simplify the right side of the equation, we can divide 13 by 4:
5x = 3.25
Now, divide both sides of the equation by 5 to solve for x:
x = 3.25 / 5
x = 0.65
Therefore, when Jennie uses 13 tablespoons of kernels, she would need 0.65 of butter.
To find out how much butter Jennie needs, we can use proportions by comparing the amount of kernels she uses to the amount of butter required in the original recipe.
First, let's determine the proportion between the tablespoons of kernels and the amount of butter.
Original proportion: 5 tablespoons of kernels = 1/4 cup of butter
To find the amount of butter when using 13 tablespoons of kernels, we set up a proportion:
5 tablespoons of kernels / 1/4 cup of butter = 13 tablespoons of kernels / X cups of butter
To solve for X (the amount of butter Jennie needs):
5 / (1/4) = 13 / X
Simplifying the left side of the equation:
5 * (4/1) = 13 / X
20 = 13 / X
Next, we can solve for X by cross-multiplying:
X * 20 = 13
Dividing both sides by 20:
X = 13 / 20
X ≈ 0.65
Therefore, Jennie needs approximately 0.65 cups of butter when using 13 tablespoons of kernels.