Week 1 Problem B

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Week 1 Problem B

Post  Archis on Wed Oct 08, 2008 5:21 pm

A calculator is permitted for this problem
Note answers: may vary based on estimations

Around the District of Columbia, areas received between 7 and 19 inches of snow. According to one local weather report, within a 50-mile radius of DC, over 5 billion tons of snow fell. How many square feet of area are in a "50-mile radius"? Use the numbers above to estimate the weight of one cubic foot of the snow that fell in DC.
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Re: Week 1 Problem B

Post  Archis on Wed Oct 08, 2008 5:22 pm

My Solution:
Spoiler:
They want it in square feet so thus: pi*(50*5280)^2 Store this as X in the calculator.

Now to find the weight of one cubic foot, we know that 13 inches fell down (median of 7 and 19) and that gives 13*(X*144), because you're changing into inches. Store this as Y

Now find the weight of 5 billion tons per pound, that would be (5*10^9) * 2000. Store as Z

Find Z/Y, giving you approximately .024. Multiply this by 1728 for the cubic foot conversion and you get 41.5 or around that estimate, based on where you rounded.
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Re: Week 1 Problem B

Post  Mira Holford on Thu Oct 09, 2008 4:20 am

workin on it...
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problem

Post  Steve on Thu Oct 09, 2008 4:43 am

how do u store stuff as X and Y in your calculator confused confused
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Re: Week 1 Problem B

Post  Mira Holford on Thu Oct 09, 2008 4:55 am

Steve wrote:how do u store stuff as X and Y in your calculator confused confused

sto-> x

i think
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store XY

Post  Steve on Thu Oct 09, 2008 6:18 am

Thanks
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Re: Week 1 Problem B

Post  Mira Holford on Thu Oct 09, 2008 6:21 am

no problem
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Re: Week 1 Problem B

Post  Steve on Mon Oct 13, 2008 4:59 am

this one's hard
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Re: Week 1 Problem B

Post  Mira Holford on Mon Oct 13, 2008 5:31 am

Steve wrote:this one's hard

ya
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Re: Week 1 Problem B

Post  Steve on Mon Oct 13, 2008 9:05 pm

well i gave up... but at least i tried
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Re: Week 1 Problem B

Post  Mira Holford on Tue Oct 14, 2008 12:50 am

Steve wrote:well i gave up... but at least i tried

me 2 Exclamation
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Re: Week 1 Problem B

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