### Solution to Problem 4:

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• \( S(18) \approx 500 \times 14.882 = 7,441 \)
• Rounded to nearest whole number: 7,441
• #### 7441
• First, compute \( g(3) = 2(3) - 5 = 6 - 5 = 1 \)
• Then \( f(g(3)) = f(1) = 3(1)^2 - 4(1) + 7 = 3 - 4 + 7 = 6 \)
• ### Solution to Problem 5:

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