Rule Of 72

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Jan 112018
 

Estimate how long it will take for an investment to double at any given interest rate with the “Rule of 72”. Remember, the Rule of 72 only applies to compound interest, not simple interest calculations.

Rule Of 72

How Do Chips Make Credit Cards More Secure?

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Jan 082018
 

If you live in the United States, you might have recently gotten a credit card with a microchip on it. But what does this chip do that makes it any different than the magnetic strip on the back of the card?

 

 
via SciShow

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