homework/Math question
09-13-2014 | 10:28 AM
#11
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Working weekends
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From: Left Seat
The answer should be:
1.1026 to the 42 power (need exponential calculator). (that is 110.26% expressed numerically).
Take that, and multiply by 26.7 Billion.
This should be the total units per year, 42 years after.
Multiply by 0.20; this is your 20% for Mystery Country X.
However, I get 323 Billion, and that is not one of your answers.
I tried again using 41 and 43 years in the exponent, but those answers are
293 Billion (using 41 years)
356 Billion (using 43 years)
Hope it helps a little...sorry no direct match, but the math principles above are correct.
1.1026 to the 42 power (need exponential calculator). (that is 110.26% expressed numerically).
Take that, and multiply by 26.7 Billion.
This should be the total units per year, 42 years after.
Multiply by 0.20; this is your 20% for Mystery Country X.
However, I get 323 Billion, and that is not one of your answers.
I tried again using 41 and 43 years in the exponent, but those answers are
293 Billion (using 41 years)
356 Billion (using 43 years)
Hope it helps a little...sorry no direct match, but the math principles above are correct.
09-13-2014 | 10:44 AM
#12
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Joined: Mar 2008
Posts: 5,681
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From: Curator at Static Display
Sat:
I didn't catch the 2011-2043 in the setup; I used your stated 42 years.
If I use 32 years, the answers are nowhere near the choices.
If the year was really 2001, and the difference is 42, then we have a winner.
Good luck!
I didn't catch the 2011-2043 in the setup; I used your stated 42 years.
If I use 32 years, the answers are nowhere near the choices.
If the year was really 2001, and the difference is 42, then we have a winner.
Good luck!
09-15-2014 | 07:06 AM
#16
Gets Weekends Off
Joined: Aug 2009
Posts: 176
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From: C-172 PPL
I weep for our country
Thanks!! This is a MBA corporate finance class and I (and a few others) were banging our heads on this one.
What happens when you guys actually have HARD problems and the jobs of thousands of employees hang in the balance?
09-15-2014 | 07:40 AM
#17
Organizational Learning
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From: Directly behind the combiner
09-15-2014 | 09:43 AM
#18
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From: ATP, CFI etc.
09-15-2014 | 12:51 PM
#19
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Working weekends
Joined: Jul 2005
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From: Left Seat
This is under the general subject heading of mathematical modeling covered in undergrad programs in Ordinary Differential Equations (ODE) courses, more commonly known as Diff-Eq. ("diffy-q"). Population growth is the usual subject, but you can use it for anything that has exponential growth rates like bacteria, cultures, temperatures, or money. The formula UAL T38 used is correct (it's a basic one) and is found here (Exponential growth wiki), but you can cook up a simple math model for anything like this as long as you know some basic facts. This topic is not all that huge, it is covered in a lecture or two at most. Once you see how it works no need to reinvent the wheel, just refresh on the correct procedure in your favorite college math book.
With that said, a lot of great folks provided the solution. Thank You
09-15-2014 | 03:54 PM
#20
Gets Weekends Off
Joined: Dec 2009
Posts: 2,115
Likes: 1
From: 127.0.0.1
I've already found out in this forum that as a "private pilot weekend warrior" I'd freeze and panic when presented with an inflight failure. Glad I can still do some limited math - albeit long hand.
Happy it worked out for ya Satpak77
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