To find out how many cups of almonds Luis needs for 3 cups of chocolate chips, we can set up a proportion based on the ratio given in the recipe.
The recipe states:
- 18 cups of almonds for every 34 cups of chocolate chips.
We can express this relationship as:
\[ \frac{18 \text{ cups of almonds}}{34 \text{ cups of chocolate chips}} = \frac{x \text{ cups of almonds}}{3 \text{ cups of chocolate chips}} \]
Now, we can solve for \(x\) (the number of cups of almonds):
Cross-multiply to get:
\[ 18 \cdot 3 = 34 \cdot x \]
This simplifies to:
\[ 54 = 34x \]
Now, divide both sides by 34:
\[ x = \frac{54}{34} \]
Calculating this gives:
\[ x \approx 1.588 \]
Now we round to the nearest tenth:
\[ x \approx 1.6 \]
Thus, Luis will need 1.6 cups of almonds. However, since this option is not present in the responses, we'll verify our calculations for correctness:
Calculating exactly:
\[ \frac{54}{34} = 1.588235294117647 \]
After rounding, the closest is 1.6 cups of almonds.
None of the provided responses match, but based on the calculations, the correct answer should be 1.6 cups. If it must be selected from options, unfortunately, there seems to be a discrepancy in the options provided.