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      Question

      A tree is at present 9 feet tall. If every year it grows

      1/9 of its height, what will be the height of the tree after three years?
      A 12 feet Correct Answer Incorrect Answer
      B 12.34 feet Correct Answer Incorrect Answer
      C 13 feet Correct Answer Incorrect Answer
      D 13.10 feet Correct Answer Incorrect Answer

      Solution

      ATQ,

      We’re told the tree is 9 feet tall now, and every year it grows by 1/9 of its current height .

      That means it's growing exponentially , not linearly.

      Let’s calculate year by year: Year 0 (present): Height = 9 feet Year 1: Year 2: Year 3: or 1000/81 = 12.34 feet

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