<PRE><B>Question 321219</B>
Using the definition of logarithm to solve logrithms equations, 
solve this: 2ln(8x)=8.
Divide both sides by 2, results
ln(8x) = 4
Write it in exponent form of logs
e^4 = 8x
Find the value of e^4 on a calc:
54.598 = 8x
{{{54.598/8}}} = x
x = 6.82475
:
Check solution on a calc: enter 2*ln(8*6.82475), results: 7.99999 ~ 8
:
;
16 grams of carbon-14 present. 
The decay model A = 16*e^-0.000121t describes the amount of carbon-14 present after t years.
 How many grams of carbon-14 will be present in 9477 years? 
A = 16*e^(-0.000121*9477) 
A = 16*e^-1.146717
Using a calculator, find e^-1.146717
A = 16*.317678
A = 5.084 grams after 9477 yrs</PRE>