A colony of 200 bacteria multiplies by 2 every hour. How many bacteria are there after 5 hours?

Answer and explanation

Correct answer: B.

  1. Step 1: After each hour the number is multiplied by 2, so .
  2. Step 2: .
Answer
.
Why not the others: : The growth was treated as linear. : One extra hour was included. : The starting value was only added.

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A colony of 200 bacteria… | Egyptian Scholastic Test (EST)