Airline Pilot Central Forums - homework/Math question

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Quote:

Originally Posted by UAL T38 Phlyer (Post 1726430)

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.

the above is 100% correct, thank you sir

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!

Good God. That's why I'm a lawyer and not a finance economics MBA type.

Now can you all help me with a mattress recommendation? :)

Thanks guys ! We are all good now !

Never Do Math in Public

I gave up after taking my shoes off and running out of fingers and toes!:D

I weep for our country

Quote:

Thanks!! This is a MBA corporate finance class and I (and a few others) were banging our heads on this one.

This is essentially a high school level algebra problem, and multiple MBAs couldn't figure it out??

What happens when you guys actually have HARD problems and the jobs of thousands of employees hang in the balance?

Quote:

Originally Posted by abelenky (Post 1727420)

This is essentially a high school level algebra problem, and multiple MBAs couldn't figure it out??

Well, 2011 + 42 = isn't exactly high school stuff. ;)

.

Quote:

Originally Posted by abelenky (Post 1727420)

This is essentially a high school level algebra problem, and multiple MBAs couldn't figure it out??...

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. :)

Quote:

Originally Posted by Cubdriver (Post 1727500)

Cub couldn't have said it better. This is more "math related" than pure finance (Time Value of Money, Annuities, etc) related.

With that said, a lot of great folks provided the solution. Thank You

Quote:

Originally Posted by rickair7777 (Post 1726458)

Agree. Somebody typed the wrong years, it's either...

32 years (2043) = 122B

or

42 years (2053) = 323B

Looks like the long Excel method worked as well. I came up with 122B (32 years) and reran it at 42 and got 323B :)

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