Question 1129687
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The way you show it, this is your equation:<br>
P(t) = {{{1600/ 1 + 9e^-0.9t}}}<br>
That's clearly not what you mean.  Use parentheses where required.<br>
P(t) = {{{1600/ (1 + 9e^(-0.9t))}}}<br>
Now that you have the right equation, evaluate it for t=2:<br>
P(2) = {{{1600/ (1 + 9e^(-0.9(2)))}}}<br>
Use your calculator....