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QUESTION 3 a) A manufacturer's marginal cost (MC) function is given by: MC = 1000 3Q+12 Find the equation of the total cost function if total costs are 5200 when Q = 8. b) A population of size x is decreasing according to the law dx -X dt 250 where t denotes the time in days. If initially the population is of size x, (that is, when t = 0, x = xo) find how long it takes for the size of the population to be halved.
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