Question 1021550
Solving for Q in the given function, we get

{{{ln((8P)/(8000 - P))/-0.001 = Q}}}

a. For P = 169.50, 
{{{Q = ln((8*169.50)/(8000 - 169.50))/-0.001 = 1753}}} to the nearest whole number.

b.For P = 125.50, 
{{{Q = ln((8*125.50)/(8000 - 125.50))/-0.001 = 2060}}} to the nearest whole number.
==> 307 more bottles will be demanded if the price fell to $125.50.

c. Just substitute Q = 1000 into the expression for P and use your scientific calculator to evaluate.  (The answer is $351.70.)

(The 8 in the denominator is not part of the exponent of e, so the equation looks like this:

{{{ P= 8000 (1 - 8 /( e^(-0.001Q) + 8))}}}.
The algebra involved in solving for Q in terms of P would have taken into account the presence of 8 in the denominator.)