[tex]\bf \textit{volume of a cylinder}\\\\
V=\pi r^2 h~~
\begin{cases}
r=radius\\
h=height\\
-----\\
r=1.5\\
h=7
\end{cases}\implies V=\pi (1.5^2)(7)\implies V=15.75\pi [/tex]
that's how many in³ are in the cylinder, and since each in³ is $0.08 or 8 pennies per in³, then the total cost of the jar is (15.75π)(0.08).
