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posted by evan on Thursday, August 6, 2009 at 5:37pm.
the function f(d) = 2d + 5 represents the number of song downloads a person can get for d dollars. What is f(4)
f(d) = 2d + 5 To find f(4), substitute 4 for d in the above equation. f(4) = 2*4 + 5 f(4) = 13
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