Multiple choice

Find the square root of $4.2025$

  1. $2.05$
  2. $2.08$
  3. $3.01$
  4. $2.09$
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A Correct answer
Explanation

To find the square root of 4.2025, note that 2.0^2 = 4 and 2.1^2 = 4.41. Since the last digit is 5, the root must end in 5, making 2.05 the correct value.

AI explanation

Express 4.2025 as the fraction 42025 divided by 10000 so that we can find the square root of the numerator and the denominator separately. The square root of 42025 is 205 and the square root of 10000 is 100. Dividing 205 by 100 results in 2.05.

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