Answer:
Step-by-step explanation:
8)
around the tank = 12 * circumference
circumference = d![\pi](https://tex.z-dn.net/?f=%5Cpi)
c = 30![\pi](https://tex.z-dn.net/?f=%5Cpi)
c = 94.2477796
area around tank = 12 * 94.2477796 = 1130.973355
now top of tank
area of a circle = ![\pi](https://tex.z-dn.net/?f=%5Cpi)
![r^{2}](https://tex.z-dn.net/?f=r%5E%7B2%7D)
*
= 706.858347
add the two surface areas together for the total
706.858347 + 1130.973355 = 1837.832
total surface area = 1837.8 ![ft^{2}](https://tex.z-dn.net/?f=ft%5E%7B2%7D)
10) all I see in the picture is a cylinder, but it's saying "composite" shape so I know there is probably more, but the cylinder is
*
* 10 = 282.7 ![ft^{2}](https://tex.z-dn.net/?f=ft%5E%7B2%7D)