Question

a jar of mayo is shaped like a cylinder. The radius of the jar is 1.5 inches and its height is 7 inches, the mayo sells for 0.08 per cubic inch what is the cost of the mayo? Use 3.14 for pi

Answer 1

`\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`

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).