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AlladinOne [14]
3 years ago
8

What is the surface area of a cube with a side length of 8 mm

Mathematics
2 answers:
Tcecarenko [31]3 years ago
7 0
S=6a²
a=8mm
S = 6 * 8² = 6 * 64 = 384 mm²
Alexus [3.1K]3 years ago
6 0
384 mm, if the surface area formula is A=2B+Ph
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Step-by-step explanation:

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The formula to solve a quadratic equation of the form ax^2 + bx + c = 0 is equal to x = [-b +/-√(b^2 - 4ac)]/2a

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substitute in the formula

x = [-11 +/- √(11^2 - 4(2)(-63))]2(2)

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since width can't be a negative number, x is 3.5

length = 2x + 11 = 2(3.5) + 11 = 18

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