7) \( \sqrt{42}= \)

Did you know that \( \sqrt{42} \) is an irrational number? This means it cannot be expressed as a simple fraction, and its decimal expansion goes on forever without repeating. The approximation of \( \sqrt{42} \) is about 6.48, but if you want a more precise value, you can use a calculator to find it to more decimal places! In real-world applications, the square root function pops up in various fields like architecture, engineering, and physics. For example, when calculating the diagonal length of a rectangular area, understanding square roots can help determine dimensions necessary for materials, ensuring everything fits together perfectly during construction!