Who Wrote This Visual Differential Equations Book?

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Dan Umbarger

Dan Umbarger, author and retired teacher, taught various levels of mathematics from grade 5 to grade 12 for over 30 years. He is married and the proud father of three children: Jimmy, Terri, and Keelan.

He is also the author of Explaining Math Logarithms and Twenty Key Ideas in Beginning Calculus.