Math Wizzes

[christopherm 0]

Ok so I only got a c+ in math 60, that is my excuse for not knowing this. -So, how hard is the ground?!

[SkydiveMonkey 0]

It will be 80*79*78*77 ...... 20 times.
I'm not crazy - I'm a Skydiver

[jfields 0]

If SkydiveMonkey is right and my math is right, the answer comes to about 8.6x10^36.
Justin

[rhino 0]

80 ???
Semper Fi .....
http:// www.aahit.com

[ChromeBoy 0]

f(x) = cos(3x) at x = 0.
1(80)=cos(20x) at x =5
5 is your answer

[flyingferret 0]

A lot! I cannot think of the formula. Look up info on combinations and/or permutations. I am not certain, but the 80*79*etc posted early is on the write track, but I think there is a much easier way to write it using combination notation. I can guarnatee you that 5 is not the correct answer.
malachi

[ChromeBoy 0]

I was wondering how long it would take for someone to figure that I have no idea what I am talking about when it comes to math.

• Quote

[jfields 0]

The answer is some form of factorial, but I don't know how to express it exactly.
80x79x78.. all the way to 1 would be 80! but I don't know how to do 80 through 60 in the proper notation.
Justin

[jfields 0]

Quote

I have no idea what I am talking about when it comes to math.

I hope you have someone competant compute your wingloading for you.
Justin

[rhino 0]

80 Semper Fi .....
http:// www.aahit.com

[ChromeBoy 0]

I do know the important stuff like wingloading. I have a calculator when it comes to other stuff. My calculator doesn't answer his question though.

[jfields 0]

Rhino,
That wasn't a joke. Look here.
Justin

[SpeedRacer 1]

I calculate things like how many drinks can I consume around the campfire & still be able to jump before noon the next day......much more relevant...
Speed Racer
"Fill your hand, you son-of-a-bitch!"

[quade 4]

See THIS and THIS TOO.
quade
http://futurecam.com

[Vallerina 2]

For 80 numbers in 20 different possibilities, it's just 80 choose 20. So it's 80!/(60! x 20!). The answer I got (from my roomie's weird calculator) is 3.5353 x 10^18 (But, it's probably wrong since I am, of course, taking math at Purdue, not exactly the best university for it!)
"Save me Jebus!" Homer Simpson

[Vallerina 2]

Woo hoo! I think I got it right without having to look at all the other links! Maybe I learned something here....besides the variety of shots offered at the bars.
"Save me Jebus!" Homer Simpson

[Schroeder 0]

no, not 80
I would think it'd be something like 20 to the power of 20. A bloody large #.
:)
"If I ventured in the slipstream; Between the via-ducts of your dreams.......could you find me?"

[indyz 1]

Nope. 20^20 would be the number of unique permutations of a set of 20 items. Having 80 items and choosing any combination of 20 from those 80 produces far more posibilities See Vallerina's post for the correct answer.
--
Brian

[ChromeBoy 0]

It's 5!

[AndyMan 7]

The easiest way I know to represent this is (80!-60!)
_Am
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[Remster 30]

It depends if the 20 numbers are to be in a particular order (1st number picked 1st, 2nd number 2nd...)
for exemple, would 1-2-3 be the same as 2-3-1 ?
if its in in order or picking, its about 8.601 x 10 ^(36)
if its not in order, its about 3.535 x 10 ^(18)
Remster
Muff 914

[jfields 0]

Remster,
What's up with you, Mr. Brainy?
At least I was on the right track.
Justin

[Remster 30]

Mr Brainy??? lol
not a 10th of the brain Val showed by knowing the formula... I forgotten that a looong time ago.... I just remembered the concept (and had a calculator that did Combinaisions and Parts).. lol
Remster
Muff 914

[jfields 0]

Good point. Vallerina can now be known honorarily as Ms. Brainy. Justin

[Vallerina 2]

Yeah, I wish I was Miss Brainy! I just happen to use that formula for all of my stat classes for the past two years (and I'm just now understanding it!!! I'm slow.) But thanks anyways!
"Save me Jebus!" Homer Simpson