Free Printable Compound Interest & Half Life Word Problems

Worksheets

Compound Interest & Half Life Word Problems

Total questions: 9

Worksheet time: 45mins

Name

Class

Date

Lauren has $90 in a savings account. The interest rate is 5%, compounded annually. To the nearest cent, how much will she have in 2 years?

$99.23

$21.98

$56.46

$9.21

Karla invested $1,000 in savings bonds. If the bonds earn 6.75% interest compounded semi-annually, how much total will Karla earn in 15 years?

$1,584.62

$2,651.39

$2,706.86

$1,825.10

Emily would like to buy some new furniture for her home. She decides to buy the furniture on credit with 9.5% interest compounded quarterly. If she spent $7,400, how much total will she have paid after 8 years.

$15,415.94

$15,683.28

$15,927.56

$16,109.05

Jay'den earned $475 from mowing lawns last summer. He deposited this money in an account that pays an interest rate of 3.8% compounded annually. What will be his balance after 15 year?

$827.52

$831.10

$839.45

$846.80

Courtney saved up $2,200 working as a waitress over the summer. She put this money into a bank account that earned 5.2% interest and is compounded daily. How much will she have in her account at the end of 4 years?

$2201.25

$2694.55

$2707.45

$2708.63

If 10 mg of iodine 131 is given to a patient, how much is left after 24 days? The half-life of iodine-131 is 8 days.

1.25mg

1.25g

10g

10mg

The half-life of strontium-90 is 25 years. How much strontium-90 will remain after 100 years if the initial amount is 4.0 g?

3.0g

0.25mg

0.3g

0.25g

You have 100 grams of radioactive C-14. The half life of C-14 is 5730 years.
How many grams are left after 1 half life?

100 grams

25 grams

2 grams

50 grams

What would be the "a" value (initial value) for this problem?

A local zoo has a population of 32 meerkats. They are doubling every 5 years. How many would there be in 10 years?

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Compound Interest & Half Life Word Problems

Total questions: 9

Worksheet time: 45mins

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