SOLUTION: I need help ASAP its for a test... please and thank you Susan invested $5000.00 at 10% compounded semiannually. In how many years will Susan's investment have tripled? Round yo

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Question 189268: I need help ASAP its for a test...
please and thank you
Susan invested $5000.00 at 10% compounded semiannually. In how many years will Susan's investment have tripled? Round your answers to the nearest tenth of a year.
A) 11.3 years B) 11.0 years C) 1.3 years D) 6.9 years
Answer by Mathtut(3670) About Me  (Show Source):
You can put this solution on YOUR website!
FV=P%281%2Br%2Fn%29%5Ent
:
15000=5000%281%2B.1%2F2%29%5E2t
:
3=1.05%5E2t
:
ln(3)=ln %281.05%5E2t%29
:
1.09=2t%28.0488%29
:
22.51=2t
:
t=11.3