Question 1142905
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3.1.1.  To answer this question, simply substitute  x= 600  into the formula and calculate.



3.1.2.  To answer this question, solve the equation  P(x) = 0,  which is


            4x^2 - 200x - 25000 = 0.


        It is a quadratic equation.


        Simplify it by dividing both sides by 4.


        Then solve it using the quadratic formula or factoring.
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