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# Quantitative Skills, Thinking, and Reasoning Activities

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Understanding Radioactivity in Geology: The Basics of Decay
Christina StringerĆ¢University of South Florida, Tampa FL 33620 This activity was developed for Spreadsheets Across the Curriculum . National Science Foundation, DUE 0442629.
PowerPoint module leading students through creation and manipulation of spreadsheet to forward model an example of exponential decayĆ¢the number of remaining unpopped kernels of popcorn in a bag of popping popcorn.

Question of the Day: Efficiency of Food Production
The figure below shows a simple food chain for land production. How much solar energy does a vegetarian utilize when eating 1,000 calories of plant material? Use the information from the figure to calculate this. ...

Westward Ho! How Far is Yonder Mountain
Len Vacher, Dept of Geology, University of South Florida
PowerPoint module leading students through development of a spreadsheet to calculate the distance of a mountain peak from coplanar vertical angles shot from two points a known distance apart.

A Look at High School Dropout Rates: Average Rates of Change and Trend Lines
Frank Wilson
Spreadsheets Across the Curriculum module. Students build a spreadsheet to calculate an average rate of change and compare it to the slope of the trend line on a scatter plot of a real-world data set

Semra Kilic-Bahi, Colby-Sawyer College
Spreadsheets Across the Curriculum module. This activity introduces the student to the concept of weighted averages by asking them to calculate course grades and grade point averages.

What's the Difference? -- Calculating the difference in wages for a bookkeeper (AA degree) vs. a cashier (no college degree)
Sun Yilin
Spreadsheets Across the Curriculum module. Students build a basic spreadsheet to calculate the accumulating difference in wages between two jobs in the context of deciding to get an AA degree.