Final answer:
To convert the area measurement of 753 (10⁶) ft² to SI units, we need to convert feet to kilometers. The area measurement is approximately 69.9 km².
Step-by-step explanation:
To convert the area measurement of 753 (10⁶) ft² to SI units, we need to convert feet to kilometers. We know that 1 foot is equal to 0.3048 meters, and 1 kilometer is equal to 1000 meters. Therefore, 1 foot is equal to 0.0003048 kilometers. Now we can use this conversion factor to convert the area measurement:
753 (10⁶) ft² x (0.0003048 km/1 ft)² = 753 (10⁶) ft² x (0.0003048 km)² = 753 (10⁶) ft² x 9.290304 (10⁻⁵) km²/ft² = 69.943436032 km²
Rounding to the correct number of significant figures, the area measurement is approximately 69.9 km².