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7-80.

It is often useful to estimate the value of a square root to determine if your answer is reasonable. Homework Help ✎

  1. What would be a reasonable estimate of ? Explain your thinking. After you have made an estimate, check your estimation with a calculator.

     because , so  must be a little higher.

  2. Repeat this process to estimate the values below.

    (1)

    (2)

    (3)

    (4)

    Since square root of is , then square root of is a little more .