Precalculus: Sequences and Series Simple Interest

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True or False? A principal is the sum of money that is borrowed or invested

True
False
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True or False? Simple interest is interest earned or paid only on the original sum of money that was invested or borrowed

True
False
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True or False? Interest is the money earned from an investment or the cost of borrowing money

True
False
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Calculate the total amount of simple interest earned after 15 years when investing $500 at 6.4% a year.

$980
$1080
$1145
$1290
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Calculate the total amount of simple interest earned after 15 years when investing $1250 at 4.1% a year

$1875.55
$2018.75
$2225.32
$2589.89
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Calculate the total amount of simple interest earned after 15 years when investing $25000 at 5% a year.

$39399
$40003
$42111
$43750
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Calculate the total amount of simple interest earned after 15 years when investing $1700 at 2.3% a year

$2286.50
$2122.41
$1984.11
$1759.12
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Dave invests $850 at 7% annual simple interest. How long will he have to leave his investment in the bank before earning $200 in interest?

2 years and 345 days
3 years and 132 days
3 years and 86 days
3 years and 2 days
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Jessica borrows $4800 for 8.5 years at a fixed rate of simple interest. At the end of that time, he owes $8000. What interest rate is she being charged?

7.84% annual interest
8.25% annual interest
9.34% annual interest
10.01% annual interest
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How much money must John invest at 6.3% annual simple interest to earn $250 in interest each month?

$43412.89
$45648.41
$47619.05
$49892.88
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