A person invested
$
8
,
900
$8,900 in an account growing at a rate allowing the money to double every 7 years. How long, to the nearest tenth of a year would it take for the value of the account to reach
$
20
,
600
$20,600?
Try dividing $8,900 by 7 to break it down to yearly. Then divide $20,600 by the yearly amount which would be $1,272. That would make the total years 16.
