Multiple choice

\text{What approximate value will replace the question mark (?) in the equation below?}\ \text{(59.99)}^{2} - \text{(8.9)}^{2} - \text{(15.9)}^{2} = ?

  1. 3260

  2. 3240

  3. 3280

  4. 3200

  5. 3340
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Approximate: (60)^2 - (9)^2 - (16)^2 = 3600 - 81 - 256 = 3263. Option A (3260) is closest. The actual with 59.99^2 - 8.9^2 - 15.9^2 is approximately 3598.8 - 79.21 - 252.81 = 3266.78, still closest to 3260.

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