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Dahasolnce [82]
3 years ago
7

Please help me with questions 8 and 10. it would literally save my life :)

Mathematics
1 answer:
Salsk061 [2.6K]3 years ago
5 0

Answer:

Step-by-step explanation:

8)

around the tank = 12 * circumference

circumference = d\pi

c = 30\pi

c = 94.2477796

area around tank = 12 * 94.2477796 = 1130.973355

now top of tank

area of a circle = \pir^{2}

\pi*15^{2} = 706.858347

add the two surface areas together for the total

706.858347 +  1130.973355 = 1837.832

total surface area = 1837.8 ft^{2}

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

\pi*3^{2}* 10 = 282.7 ft^{2}

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