# 14.1 How to accumulate personal wealth  (Page 2/13)

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Many U.S. citizens can accumulate a large amount of wealth during their lifetimes, if they make two key choices. The first is to complete additional education and training. In 2014, the U.S. Census Bureau reported median earnings for households where the main earner had only a high school degree of $33,124; for those with a two-year associate degree, median earnings were$40,560 and for those with a four-year bachelor’s degree, median income was $54,340. Learning is not only good for you, but it pays off financially, too. The second key choice is to start saving money early in life, and to give the power of compound interest a chance. Imagine that at age 25, you save$3,000 and place that money into an account that you do not touch. In the long run, it is not unreasonable to assume a 7% real annual rate of return (that is, 7% above the rate of inflation) on money invested in a well-diversified stock portfolio. After 40 years, using the formula for compound interest, the original $3,000 investment will have multiplied nearly fifteen fold: $3,000{\left(1+.07\right)}^{40}=\text{}44,923$ Having$45,000 does not make you a millionaire. Notice, however, that this tidy sum is the result of saving $3,000 exactly once. Saving that amount every year for several decades—or saving more as income rises—will multiply the total considerably. This type of wealth will not rival the riches of Microsoft CEO Bill Gates, but remember that only half of Americans have any money in mutual funds at all. Accumulating hundreds of thousands of dollars by retirement is a perfectly achievable goal for a well-educated person who starts saving early in life—and that amount of accumulated wealth will put you at or near the top 10% of all American households. The following Work It Out feature shows the difference between simple and compound interest, and the power of compound interest. ## Simple and compound interest Simple interest is an interest rate calculation only on the principal amount. Step 1. Learn the formula for simple interest: Principal × Rate × Time = Interest Step 2. Practice using the simple interest formula. Example 1:$100 Deposit at a simple interest rate of 5% held for one year is:

$100 × 0.05 × 1 =$5

Simple interest in this example is $5. Example 2:$100 Deposit at a simple interest rate of 5% held for three years is:

$100 × 0.05 × 3 =$15

Simple interest in this example is $5. Step 3. Calculate the total future amount using this formula: Total future amount = principal + interest Step 4. Put the two simple interest formulas together. Total future amount (with simple interest) = Principal + (Principal × Rate × Time) Step 5. Apply the simple interest formula to our three year example. Total future amount (with simple interest) =$100 + ($100 × 0.05 × 3) =$115

Compound interest is an interest rate calculation on the principal plus the accumulated interest.

Step 6. To find the compound interest, we determine the difference between the future value and the present value of the principal. This is accomplished as follows:

Compound interest = Future Value – Present Valve

Step 7. Apply this formula to our three-year scenario. Follow the calculations in

 Year 1 Amount in Bank $100 Bank Interest Rate 5% Total$105 $100 + ($100 × 0.5) Year 2 Amount in Bank $105 Bank Interest Rate 5% Total$110.25 $105 + ($105 × .05) Year 3 Amount in Bank $110.25 Bank Interest Rate 5% Total$115.75 $110.25 + ($110.25 × .05) Compound interest $115.75 –$100 = $15.75 Step 8. Note that, after three years, the total is$115.75. Therefore the total compound interest is $15.75. This is$0.75 more than was obtained with simple interest. While this may not seem like much, keep in mind that we were only working with \$100 and over a relatively short time period. Compound interest can make a huge difference with larger sums of money and over longer periods of time.

#### Questions & Answers

how do you translate this in Algebraic Expressions
Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=
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what's the easiest and fastest way to the synthesize AgNP?
China
Cied
types of nano material
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
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Yasmin
what is the function of carbon nanotubes?
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what is nanomaterials​ and their applications of sensors.
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Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
what is system testing
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Stotaw
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
Azam
anybody can imagine what will be happen after 100 years from now in nano tech world
Prasenjit
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
Azam
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
Prasenjit
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
Damian
silver nanoparticles could handle the job?
Damian
not now but maybe in future only AgNP maybe any other nanomaterials
Azam
can nanotechnology change the direction of the face of the world
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