Latreyll B.

asked • 12/01/20

Investment: Rule of 70 The Rule of 70 says that the time necessary for an investment to double in value is approximately 70/r, where r is the annual interest rate entered as a percent.

Investment: Rule of 70

 The Rule of 70 says that the time necessary for an investment to double in value is approximately 70/r,

 where r is the annual interest rate entered as a percent. Use the Rule of 70 to approximate the times necessary for an investment to double in value when r = 7% and r = 10%.

(a)

r = 7%

 years

(b)

r = 10%

 years


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