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1. |
Which equation represents exponential decay? |
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A. |
y = 1.7(1.06)x |
B. |
y = 0.86(1.46)x |
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C. |
y = 2.62(1.22)x |
D. |
y = 1.05(0.95)x |
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Hint |
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2. |
The Mendoza family just bought a house for $180,000. If the value of the house increases at a rate of 3% per year, about how much will it be worth in 10 years? |
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A. |
$258,000 |
B. |
$242,000 |
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C. |
$250,000 |
D. |
$234,000 |
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Hint |
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3. |
Twyla puts $1000 in a savings account that pays 4% interest, compounded monthly. How much money will be in the account 3 years later if she makes no more deposits? |
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A. |
$1127.27 |
B. |
$1120.00 |
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C. |
$1010.03 |
D. |
$1124.86 |
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Hint |
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4. |
Nancy invests $100 in one account for ten years at a 9% interest rate compounded annually, and she invests $150 in an account for 10 years at a 6% interest rate compounded semi-annually. How much money will she have in the accounts after 10 years? |
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A. |
$270.92 |
B. |
$236.74 |
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C. |
$505.36 |
D. |
$507.65 |
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Hint |
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5. |
Each year, new computers are built with better technology, making older ones less valuable. If the computers looses value at a rate of 20% per year, how much will a $1500 computer be worth in ten years? |
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A. |
$1,200 |
B. |
near $0 |
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C. |
$161.06 |
D. |
$9,287.60 |
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Hint |
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