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Time and Average

This topic has 2 member replies
tsmith93 Senior | Next Rank: 100 Posts Default Avatar
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19 Feb 2010
Posted:
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Time and Average

Post Wed Mar 03, 2010 6:35 pm
Thirty years ago, Mr. and Mrs. Lopez purchased a house. On average, the value of the house has doubled every 6 years. If the house is worth $320,000 today, what did they pay for it 30 years ago?

(A)$5,000
(B)$10,000
(C)$64,000
(D)$160,000
(E)$320,000*2^5

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herbalsejagat Newbie | Next Rank: 10 Posts
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Post Tue Sep 19, 2017 7:39 pm
Are we sure about the OA on this one?

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truplayer256 Master | Next Rank: 500 Posts Default Avatar
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15 Jan 2009
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Post Wed Mar 03, 2010 8:19 pm
Let the price that Mr. and Mrs. Lopez spent on the house be represented by the variable x. Then,

2x- 6 years later

4x-12 years later

8x-18 years later

16x-24 years later

32x-30 years later

32x=320000

x=10,000

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