Units: Practice Problem & Solution

Solution Explained:

To solve this problem, we apply the core principles of Units. Understanding the underlying formula is key to arriving at the correct answer below:

The multiplication result must be rounded to the least number of significant figures among the measured values. Since 3.4 has only 2 significant figures, the result \(77.52\text{ m}^2\) is rounded to 2 significant figures, which is \(78\text{ m}^2\).