<PRE><B>Question 1010448</B>
We set it up this way
A(t) = Ao * (1 + r)^t
and plugging in we get
20 = 4(1+.27)^t
Now divide by 4 and get
5 = 1.27^t
Take the log of both sides and use the power rule and get
log 5 = t * log(1.27)
Now divide by log(1.27) and get
t = log 5 / log 1.27 = 6.73 days rounded to
7 days
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