Question 19 • Algebraic Reasoning
To find the new profit, substitute the increased sales amount, l(d) = 1.5d, into the original profit function: p(l(d)) = -15(1.5d)² + 1,200(1.5d) - 2,000. Since (1.5d)² = 2.25d², this simplifies to -33.75d² + 1,800d - 2,000. The correct choice is B.
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