# Precalculus: Sequences and Series Simple Interest

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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 Login to try these questions ### 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

### Calculate the total amount of simple interest earned after 15 years when investing $25000 at 5% a year.$39399
$40003$42111
$43750 Login to try these questions ### 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

### 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

### 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
### 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