Question

Please help me, I need it to pass..

Answer 1

The formula for the new, smaller cone in terms of surface area is this:\[SA=\pi (\frac{ 8 }{ 5 })^{2}+\pi (\frac{ 8 }{ 5 })(\frac{ 13 }{ 6 })\]

Answer 2

Looks crazy, but that is just saying that the radius of the smaller is 1/5 of the original which is 8, so the radius of the smaller is 1/5 * 8 which is 8/5. Same goes for the slant height. Let's just solve this now.

Answer 3

Doing the math you get:\[SA=\frac{ 64 }{ 25 }\pi + \frac{ 104 }{ 30 }\pi \]

Answer 4

Common denominator needs to be found in order to add these

Answer 5

2 and 5?

Answer 6

What you get in the end after all the adding is 452 pi/75. When you divide 452 by 75 and multiply it by 3.14, you get 18.93 That's your answer.

Answer 7

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