Solve the problem.A kennel owner has 400 feet of fencing to enclose a rectangular dog exercise pen. Express the area of the exercise pen, A, as a function of one of its dimensions, x.
A. A(x) = x(200 - x)
B. A(x) = x(x - 200)
C. A(x) = (200 - x)2
D. A(x) = x(400 - x)
Answer: A
Mathematics
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A. -2
B. 2
C. 2
i
D. -2
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+ 5 ? 8
A. {x
x ? -1}; (-?, -1]
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x < 8}; (-?, 8)
C. {x
x ? 6}; (-?, 6]
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