1.7 Case Study: Modeling with Elementary Functions: Quiz

Problem 1

Today you discover that a space ship has landed in your back yard, and tomorow you tell your next door neighbor. The day after that, you and your neighbor each tell one new person about the space ship. Each day thereafter, each person who knows tells a new person. What formula below gives the number of people who know about the space ship after x days?

  1. 1 + 2 + 4 + 8 + ... + 2x
  2. x2
  3. e2x
  4. 2x

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