SOLUTION: How long will it take money to double if it is invested at 21% compounded continuously? ""invested at 33% compounded continuously?

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Question 345408: How long will it take money to double if it is invested at 21% compounded continuously? ""invested at 33% compounded continuously?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
2P=Pe%5E%280.21t%29
e%5E%280.21t%29=2
0.21t=ln%282%29
t=ln%282%29%2F0.21 or approximately,
t=3.3 years
.
.
.
0.33t=ln%282%29
t=ln%282%29%2F0.33
t=2.1 years