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To evaluate for e = 14, substitute 14 in for e in the expression 0.03(5e^2).
0.03(5(14^2)) = 0.03(5(196)) = 0.03(980)
0.03 * 980 = $<<0.03*980=29.400>>29.40
Therefore, for e = 14, the cost of the wood is $29.40.