2. For the following problems determine f(x) from the given f'(x): a. f'(x) = 3x+2x+4 b....

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2. For the following problems determine f(x) from the given f'(x): a. f'(x) = 3x²+2x+4 b. f'(x) = + 3ex 3. Given that the marginal cost is C'(x) = 12x² + 6x and the monthly fixed costs are $800. Find the cost function. 4. Determine the Revenue function when the marginal Revenue function is R'(x) = 100 -0.2x and the Revenue is $30,000 when 400 units are sold. 2. For the following problems determine f(x) from the given f'(x): a. f'(x) = 3x²+2x+4 b. f'(x) = + 3ex 3. Given that the marginal cost is C'(x) = 12x² + 6x and the monthly fixed costs are $800. Find the cost function. 4. Determine the Revenue function when the marginal Revenue function is R'(x) = 100 -0.2x and the Revenue is $30,000 when 400 units are sold.