A record club has found that the marginal profit, P'(x), in cents, is given by P'(x) = -0.0008x³ +0.36x² +34.9x for x ≤ 400, where x is the number of members currently enrolled in the club. Approximate the total profit when 240 members are enrolled by computing the sum ΣP' (xi) Ax with Ax=40. The total profit when 240 members are enrolled is approximately $. (Round to the nearest cent as needed.) 24,000-px-0.00pex+0.36x²+34 9x the 19,200 14.400 9.600 4.800 2 NV VI 100 200 300 Number of members 400

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