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Mathematics 9 Online
OpenStudy (sagewilson):

I used d = L^2 + W^2 + H^2 to help me solve this but the answer just didn't come out right.

OpenStudy (sagewilson):

Directrix (directrix):

Did you take the square root of the sum after you calculated L^2 + W^2 + H^2 ?

OpenStudy (sagewilson):

yes, that left me with a decimal.

Directrix (directrix):

What was the exact answer? Square root of what?

OpenStudy (sagewilson):

428

Directrix (directrix):

Does that factor?

OpenStudy (sagewilson):

you mean like does it simplify or does it go with what is given?

Directrix (directrix):

Prime factorization of 72: 72 = 2 * 2* 2 * 3 * 3 Do that with 428 so that we can simplify the radical.

OpenStudy (sagewilson):

okay, give me a sec to do that

Directrix (directrix):

No rush.

OpenStudy (sagewilson):

okay, also I finished and I was left with 107, if I tried factoring that I'd be left with a decimal

Directrix (directrix):

So, 428 = ? times ? times 107?

OpenStudy (sagewilson):

2 * 2 * 107

Directrix (directrix):

Correct. |dw:1417526476864:dw|

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