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1. Find all zeros of the polynomial. (Enter your answers as a comma-separated list. Enter all...

1. Find all zeros of the polynomial. (Enter your answers as a comma-separated list. Enter all answers including repetitions.)

P(x) = 12x4 + 12x3 + 15x2 + 12x + 3

2. A graphing calculator is recommended.A solar panel manufacturer estimates that the profit y (in dollars) generated by producing x solar panels per month is given by the equation S(x) = 8x + 0.8x2 − 0.002x3 − 4000. Graph the function in the viewing rectangle [0, 400]  by [−10,000, 20,000]. For what range of values of x is the company's profit greater than $13,000? (Round your values to the nearest integer. Enter your answer using interval notation.)

= ____ units

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