A certain investment takes 18 years to grow 5 times.
How long would it take to double itself? What annual
rate of simple interest does the investment earn?
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Answer:
Step-by-step explanation:
rate r = 100xI/pn. (I interest, P principal, n=no. of yrs)
r = 4px 100/px 18=22 2/9%
n =.px loox9/px 200=4.5 yrs
Rate 22 2/9% and period: 4.5 yrs
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