To calculate the amount of foam needed to create one of these cheese wedge hats, we can use the formula for the volume of a triangular prism:
\[ \text{Volume} = \frac{1}{2} \times \text{base} \times \text{height} \times \text{depth} \]
Given that the height of the triangle (which is also the height of the hat) is 10 inches and the depth of the foam used for the hat is not provided, we cannot accurately calculate the volume without this dimension.
If we assume a standard depth for the foam used in such hats, let's say 2 inches, we can proceed with the calculation:
\[ \text{Volume} = \frac{1}{2} \times \text{base} \times \text{height} \times \text{depth} \]
\[ \text{Volume} = \frac{1}{2} \times 15 \, \text{in} \times 10 \, \text{in} \times 2 \, \text{in} \]
\[ \text{Volume} = \frac{1}{2} \times 150 \, \text{in}^3 \]
\[ \text{Volume} = 75 \, \text{in}^3 \]
Therefore, it takes approximately 75 cubic inches of foam to create one of these cheese wedge hats, assuming a depth of 2 inches. If the actual depth of the foam differs, the volume would need to be recalculated accordingly.