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## 42 Folds to the Moon; Lottery Players Seeing Double

Clips about paper folding and lottery numbers inspire questions about exponential growth and probability.

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## Exploring Logarithms with a Ruler

Processes using linear measurement can be adapted to teach complex topics such as polynomial multiplication, rational exponents, and logarithms.

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## Applications in Digital Image Processing

Use digital signal processing to capitalize on an exciting intersection of mathematics and popular culture.

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## A Rationale for Irrationals: An Unintended Exploration of e

The practice of problem posing is as important to develop as problem solving. The resulting explorations can be mathematically rich.

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## Media Clips: Global Population Explosion; U.S. Population Growth

Students analyze items from the media to answer mathematical questions related to the article. Linear and exponential models for population growth are explored, and dimensional analysis is used.

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## The Back Page: Financing a College Education

A favorite lesson is presented by a teacher. This lesson involves student participation in planning post-secondary school financing. Compound interest and the present and future value formulas are the mathematical basis for the lesson.

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## A Natural Approach to the Number e

Building on prior knowledge of slope, this approach helps students develop the ability to approximate and interpret rates of change and lays a conceptual foundation for calculus.

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## Media Clips: NFL Players' Life Expectancy; Transit of Venus

Students analyze items from the media to answer related mathematical questions. The mathematics involved in this month's clips includes percent loss and gain, proportional reasoning, and the application of Kepler's laws, which involve exponential equations and regression.

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## Elementary Algebra Connections to Precalculus

Students use elementary algebra concepts to solve trigonometric and logarithmic equations and systems.

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## Media Clips: World Population Soon to Hit 7 Billion//Facebook Mathematics

Students analyze items from the media to answer mathematical questions related to the article. Exponential growth is the topic of both clips this month.