<PRE><B>Question 159007</B>
Suppose that the function P=13+45 ln x.
Use this model to determine in how many years (to two decimal places) it will take for the percent of spam to reach 95% 
:
13 + 45*ln(x) = 95
:
45*ln(x) = 95 - 13
:
45*ln(x) = 82
:
ln(x) = {{{82/45}}}
ln(x) = 1.822; which is what you got
:
Using a calc, find e^x, enter 1.822
x = 6.19 years</PRE>