Answer:
Step-by-step explanation:
8)
around the tank = 12 * circumference
circumference = d[tex]\pi[/tex]
c = 30[tex]\pi[/tex]
c = 94.2477796
area around tank = 12 * 94.2477796 = 1130.973355
now top of tank
area of a circle = [tex]\pi[/tex][tex]r^{2}[/tex]
[tex]\pi[/tex]*[tex]15^{2}[/tex] = 706.858347
add the two surface areas together for the total
706.858347 + 1130.973355 = 1837.832
total surface area = 1837.8 [tex]ft^{2}[/tex]
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
[tex]\pi[/tex]*[tex]3^{2}[/tex]* 10 = 282.7 [tex]ft^{2}[/tex]
