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1. |
Real Estate Julie bought a house for $100,000 five years ago. If the value of the house has appreciated 5% per year, how much is it worth now? |
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A. |
$127,628.16 |
B. |
$125,000.00 |
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C. |
$119,643.57 |
D. |
$77,378.09 |
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Hint |
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2. |
Business An analyst estimates that the computers his company just bought will depreciate at a rate of 25% per year. At this rate, approximately how long will it take a computer to depreciate to 30% of its original value? |
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A. |
3 years |
B. |
4 years |
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C. |
10 years |
D. |
5 years |
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Hint |
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3. |
Radioactivity The half-life of uranium-232 is 72 years. Find the approximate value of k in the formula y = nekt for uranium-232. Assume t is in years. |
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A. |
0.0012 |
B. |
-0.0048 |
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C. |
-0.0096 |
D. |
-0.0024 |
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Hint |
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4. |
Paleontology A fossil is found that contains 10% of the amount of carbon-14 found in a living being. About how old is the fossil? |
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A. |
17,600 years |
B. |
15,300 years |
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C. |
19,200 years |
D. |
20,700 years |
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Hint |
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5. |
Population The population of Redville grew from 5432 in 1990 to 7116 in 2000. Assuming the population is growing exponentially, predict the population of Redville in 2005. |
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A. |
about 8290 |
B. |
about 7960 |
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C. |
about 8140 |
D. |
about 8360 |
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Hint |
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