Algebra Adventure
  • Adventure Central
  • Quadratic Quandry
    • Level One: Quadratics In Vertex Form>
      • What is Vertex Form
      • Transforming General Form to Vertex Form
      • Will it Hit The Hoop?
    • Level Two: Graphs Using Vertex Form>
      • Graphing Quadratics in Vertex Form
      • Quadratic Modeling Using Vertex Form
      • Project: Modeling the Golden Gate Bridge
      • Project: Quadratic Regression Modeling
    • Level Three: Optimization Using Quadratic Functions>
      • What is Optimization?
      • Optimization With Quadratic Functions
      • Problem Solving With Quadratic Optimization
  • Sequences Spree
    • Level One: Arithmetic Sequences>
      • Number Sequences
      • Identifying and Using Arithmetic Sequences
      • Problem Solving With Arithmetic Sequences
    • Level Two: Geometric Sequences>
      • Identifying and Using Geometric Sequences
      • Connection: Geometric Sequences & Exponentials
      • Problem Solving With Geometric Sequences>
        • Double Sunglasses
        • Fry's Bank
        • Incredible Shrinking Dollar
  • Logarithm Legend
    • Level One: Intro to Logarithms>
      • Logarithms & Exponentials
      • Logarithms in Base 10
    • Level Two: The Laws of Logarithms & Natural Logs>
      • Investigation: Discovering the Laws of Logarithms
      • Using the Laws of Logarithms
      • Natural Logarithms
    • Level Three: Applications of Logarithms>
      • Solving Exponential Equations Using logs
      • Further Problem Solving Using Logs>
        • Double Sunglasses: Reprise
        • Fry's Bank: Reprise
        • Domino Skyscraper

Incredible Shrinking Dollar
"Incredible Shrinking Dollar" by Dan Meyer CC BY-NC 3.0

If he copies the dollar eight times (total), what size will the final copy be?
Write down a guess that you think is too small.
Write down a guess that you think is too big.
What information would be helpful in answering the question?
dollar_size.pdf
File Size: 628 kb
File Type: pdf
Download File

If Dan wanted to expand the 8th copy of the bill back to its original size with one copy, what percentage would he set the copier for?

You could turn a US dollar coin (26.5 mm diameter) into the size of a dime (17.91 mm diameter) by copying it four times at 90%. Show two other ways you could do the exact same thing.