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That's a good answer. Also if you meant how do you square the square root of seven, then you can use this. Any square root times itself is the number inside the radical

How far have you gotten so far?

Well you can use the calculator, but it is continued so you probably will have to round on your answer.

2.64575131...

sqrt(7 = 2.6457513110645906

Hope this helps ;P

Bulls-eye ! 

\(\text{The 80% learning curve rate means that the cost of each successive iteration }\\ \text{is 80% of the previous while the cumulative output doubles.}\\ C(n)=(0.8)^{n-1}C_1\\ C_1=\$60/hr \cdot 100000hr = \$6\times 10^6\\ C(10) = \$6\times 10^6 \cdot (0.8)^{10} = \$644245.09\\ \text{You do the 20th iteration}\)

You’re right.  The explanation was even more confusing than I first thought!

Use  ncr(26,4)

Thank you!

Thanks guest. :)

Thanks Tiggsy.

I do wish you would get yourself an account.

I have often want to look back at your contributions and I can't.

If you had posted under username it would be easy for me to do.  

What about this statement Alan.

"Since xyz is positive, two of them aren't negative because a negative times a negative is a positive, and we've already ruled out the option of three."

If we had          a negative * a negative * a postitive then    xyz would be positive and that is what we want.

I just got my nails done and I feel like a million bucks... or, 10⁶ as we math majors say. 

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Lol. Just a bit to fast for me

when you look at the calaculator on the home page the button that does square roots is the one under the one that shows the square root symbol and shows a 3 above it . but remeber  click it first then do the number your looking for....

LOL I guess so XD

What he said. he beat me to it lol