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26 July, 12:30

A rectangular area of 2,000 square feet is to be fenced on three sides with fence costing $0.30 per foot and on the fourth side with fence costing $0.50 per foot. If x denotes the length of the fourth side and C = ƒ (x) denotes the corresponding cost of the fence in cents. Give the domain of the function

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  1. 26 July, 12:48
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    2000 = x * y

    y = 2000 / x

    c = 0.3 * (2y + x) + 0.5x = 0.6y + 0.8x = 0.6 * 2000 / x + 0.8x = 1200/x + 0.8x
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