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

Double Sunglasses
"Double Sunglasses" by Dan Meyer CC BY-NC 3.0

What percent tint will there be when he puts on both pairs of sunglasses?
Write down a guess you think is too small.
Write down a guess you think is too big.
Now calculate what you think the correct answer is.
Can he reach 100% tint this way?

How many pairs of 50% tint sunglasses would it take?