Percent to Decimal
35%
0.35
What does r stand for?
Interest rate
You put $550 in a savings account. It is compounded monthly at 4.5%. How much will it be worth in 30 years?
$2,116.23
A coin had a value of $1.17 in 1995. Its value has been increasing at 9% per year. What is the value after 5 years?
$1.80
Write the formula for the "half-life" formula
A=P(0.5)^(t/h)
6.7%
0.067
You put $500 in an account. It earns 6% interest compounded monthly. How much will it be worth in 10 years?
What is the principal?
$500
Lance put $950 in an account that is compounded quarterly at 3%. How much will it be worth in 5 Years?
$1,103.12
Gina deposited $1500 in an account that pays 4% interest compounded quarterly. What will the balance be in 2 years?
$2052.85
The half-life of radon-222 is 3.8 days. How much of a 100 g sample is left over after 15.2 days?
What is 6.25 g?
10%
0.10
or, even better: 0.1
You put $500 in an account. It earns 6% interest compounded monthly. How much will it be worth in 10 years?
What would the "t" number be?
10
Jerry put $150 in an account that is compounded annually at 13%. How much will it be worth in 15 Years?
$938.14
Determine the amount of interest earned on a $2500 investment if it is invested at 5.25% annual interest compounded monthly for four years.
$29147.48
An isotope of cesium (cesium-137) has a half life of 30 years. If 1.0g of cesium-137 disintegrates over a period of 90 years. How many grams of cesium-137 remain?
What is 0.125g?
0.5%
0.005
You put $500 in an account. It earns 6% interest compounded monthly. How much will it be worth in 10 years?
What is the rate?
6%
Carrie put $1,050 in an account that is compounded quarterly at 10.5%. How much will it be worth in 8 Years?
$2,405.97
Determine the amount of interest earned on a $100,000 investment if it is invested at 5.2% annual interest compounded quarterly for 12 years.
$1,139,608.06
The doctor gave you 700 milligrams of a drug. It has a half life of 4.5 hours. How much of the drug is in your bloodstream after 2 days?
What is 0.43 milligrams
(remember to convert to hours!)
0.025%
0.00025
You put $500 in an account. It earns 6% interest compounded monthly. How much will it be worth in 10 years?
What would the "n" number be?
12
Morgan put $10,750 in an account that is compounded quarterly at 8%. How much will it be worth in 12 Years?
$27,811.01
Determine the final account balance of an investment if $300 is invested at an interest rate of 6.75% compounded semiannually for 20 years.
$4091.07
A radioactive isotope has a half life of 2.37 years. How much of the sample did we start with if it took 8.2 years to reach 82 grams?
What is 902.3 grams