Using the rule of 70,about how much would $100 be worth after 50 years if the interest rate were 7 percent?
A)$400
B)$800
C)$1,600
D)$3,200

Question

Quizplus · Accepted Answer

The rule of 70 estimates that an investment will double in value every 70 divided by the interest rate years. At 7% interest, the investment doubles approximately every 10 years (70/7). In 50 years, the investment will double 5 times: $100 → $200 → $400 → $800 → $1,600 → $3,200.

Using the Rule of 70,about How Much Would $100 Be