If you need to remove extra white double-spaces between words or paragraphs in Word, then follow the steps laid down in this post.

While the rule of 72 is a useful rule of thumb to estimate investment returns, using an online calculator or a compound growth formula may yield more accurate results.

For example, if you're earning 6% on your investment, the rule of 72 says your money will double in 12 years, while the rule of 69 says it will take 11.5 years.