Question 40616
{{{P = 14.7e^(-0.21x)}}}
x = 3
{{{P = 14.7*e^-0.63}}}
take the natural log of both sides
{{{ln(P) = ln(14.7e^-.63)}}}
{{{ln(P) = ln(14.7) - .63}}}
(because ln(e^a) = a)
{{{ln(P) = 2.688 - .63}}}
{{{ln(P) = 2.058}}}
{{{P = e^2.058}}}
{{{P = 7.8}}}