Quick links to Front matter, Back matter, and:

**Part One**: Ch 1: Introduction, Ch 2: Speed, Ch 3: Area, Ch 4: Fundamental theorem, Ch 5: Limits

**Part Two**: Ch 6: Derivatives, Ch 7: Toolkit, Ch 8: Extreme, Ch 9: Optimization, Ch 10: Economics

**Part Three**: Ch 11: Hard way, Ch 12: Easy way, Ch 13: Revisited, Ch 14: Physics, Ch 15: Conclusion

**Page 119: Introductory page**

**Pages 120-121: Economics is about… // …and that makes calculus extremely handy…**

**Pages 122-123: What makes optimization problems in economics special… // The way economists balance them…**

*MB: p.122 Define Q.*

*WM: Page 122 – I would use the gag “Isn’t that special?”, but younger readers won’t get the joke, and Dana Carvey would sue you.*

*MB: p. 123 Maybe pick different numbers so the 2 Q^2 doesn’t come in on both sides?*

**Pages 124-125: A mathematician would set up this problem… // An economist would head for the same destination…**

**Pages 126-127: The way for you to find economics enlightenment… // Now let’s apply the same logic…**

*MB: p. 127 Explicitly define marginal cost and marginal revenue.*

*WM: Good explanation on page 127.*

**Pages 128-129: Similar examples of marginal analysis… // Of course, we shouldn’t forget…**

**Page 130: When you encounter more economics…**

Quick links to Front matter, Back matter, and:

**Part One**: Ch 1: Introduction, Ch 2: Speed, Ch 3: Area, Ch 4: Fundamental theorem, Ch 5: Limits

**Part Two**: Ch 6: Derivatives, Ch 7: Toolkit, Ch 8: Extreme, Ch 9: Optimization, Ch 10: Economics

**Part Three**: Ch 11: Hard way, Ch 12: Easy way, Ch 13: Revisited, Ch 14: Physics, Ch 15: Conclusion