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- anonymous

Two similar cones are shown in the image below.
What is the approximate surface area of the larger cone?
1544.4 square yards
978.5 square yards
2,162.3 square yards
1,103.1 square yards

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- anonymous

- schrodinger

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- anonymous

- across

This is a proportion problem; you need to know how to set up a proportion to estimate the radius of the larger cone. You also need to know how to compute the surface area of a cone. Where are you stuck?

- anonymous

everything

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- across

I'll give you a hint: the surface area of a cone is\[SA=\pi r^2+\pi rl,\]where|dw:1346792025872:dw|

- across

That's about half of the problem right there, and what do you mean with "everything"?

- anonymous

why did you tag me in this?

- anonymous

cause i need helpppppppppppppppppppppppppppppppppppppppppp

- anonymous

oh k well im really sorry i dont know this :( do you have a formula for finding the surface of a cone?

- across

Sometimes I really wonder if people can see my posts, lol.

- anonymous

lol

- anonymous

how you do that!!!!!!

- anonymous

@crystal1 the other girl across is helping you find the answer

- anonymous

@crystal1 umm what grade r u in?

- anonymous

10

- anonymous

oh thats why i dont understand it in only in 9th

- anonymous

lol

- across

I don't think @crystal1 wants my help. <:) Oh well, good luck!

- anonymous

yes i do

- anonymous

well take her help and work it out

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