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Explanation
In the question, we are given that,
[tex]\begin{gathered} height\text{ of cone = 7.5 inches} \\ radius\text{ of cone = 1.5 inches} \end{gathered}[/tex]We will need to find the volume of the cone.
[tex]volume\text{ of a cone =}\pi r^2h[/tex]Therefore, we will have;
[tex]V=\pi\times1.5^2\times7.5=53.0144[/tex]So for 12 hats with candy, we will have;
[tex]12\times V=12\times53.0144=636.1728[/tex]Answer: 636.1728 cubic inches