Darel and Linda Hardy
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Darel and Linda 2000 – 2009
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Terezin
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Post Trip in Bruges
Bruges
Bike ride
Delft
Ghent
Darel and Linda 2014
Tokyo
Beijing
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Yangtze
Xi’an
Guilin and the Li River
Hong Kong
Books about China
Mickelson Trail 2014
Darel and Linda 2015
South America 2015
Lima
Amazon rain forest
Cusco and Machu Picchu
Ecuador and the Galapagos
Darel and Linda 2016
Darel and Linda 2017
Darel and Linda 2018
Cabo San Lucas
Australia
New Zealand
Fiji
Route of the Maya
Darel and Linda 2019
Darel and Linda 2020
Darel and Linda 2021
Darel and Linda 2022
Darel and Linda 2023
Iowa Bike Tour
Darel and Linda 2024
Croatia at Christmas Time
Milestones
Erie Canal Bike Tour
Short trips
Rhone River
The Way I Remember It
Old Chicago Bike Tours
Darel’s Life on the Farm
Darel’s Campus Life
Darel’s Personal Life
Darel’s Professional Life
Darel’s Score Card
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How I Became a Mathematician
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Mill Creek
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Books
Basic Calculus
Doing Mathematics
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Calculus
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AP Calculus
Precalculus
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Calculus
Doing Mathematics
Precalculus
Rings and Modules
Statistics Primer
The First 101 Interesting Numbers
Topics in Mathematics
Animations
Curves and Functions
Logarithms
Parabola of best fit
Details
Riemann Sum
Morphing
Surface area
Polar morph
Instructions
Transforming a sphere into a cone
Transforming a sphere into a donut
Optimization problems
Box
Cone in a sphere
Cylinder in a cone
Cylinder in a sphere
Rectangle in an ellipse
Solids
Average radius
Cylindrical shells
Double integral
Solid of revolution
Three pyramids
Surfaces
Contours
Cross section
Partial derivative
Surface area
Area of a circle
What is an ellipse?
Rectangular Equations
Parametric Equations
Details
Average Values
Average Distance
Unit Interval
Unit Square
Unit Circle
Unit Cube
Unit Sphere
Average Area
Rectangle
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Rotated Square
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Rectangular solid
Cube
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Weighted Averages
Functions
Polar
Ellipse
Glossary of Math and Science
Quotes
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