02-16-2010, 10:23 PM
I believe the answer is 17.33 hours, but please double check my work.
The formula you want is A = Pe^rt
There's more information about it here: Exponential Word Problems
A = Pe^rt
2 = e^.04t
ln(2) = .04t*ln(e)
0.693 = .04t
17.33 = t
The formula you want is A = Pe^rt
There's more information about it here: Exponential Word Problems
A = Pe^rt
2 = e^.04t
ln(2) = .04t*ln(e)
0.693 = .04t
17.33 = t
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