Re-write with a common denominator, in this case 12:
Add:
Step A: a (x + StartFraction b Over 2 a EndFraction) squared = –c + StartFraction b squared Over 2 a EndFraction a (x + StartFra
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Re-write with a common denominator, in this case 12:
Add:
The equation for surface area is: 
. To get r, you must use Pythagorean theorem. r is found to be 45. This means after you plug it in, you get about 13571.68