It cost publishing company $10.15 to manufacture a test prep book the book sells for $19.95 What is the percent markup on the bo
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If
then by the fundamental theorem of calculus, the derivative is
and the second derivative is
The curve is concave up whenever
. Since the denominator is always positive, you only need to worry about the numerator:
Solving for
yields
then by the fundamental theorem of calculus, the derivative is
and the second derivative is
The curve is concave up whenever
Solving for