If a rectangle has an area of 5 m25 \text{ m}^25 m2, what is its area in square millimeters\text{square millimeters}square millimeters?
5×103 mm25 \times 10^3 \text{ mm}^25×103 mm2
5×104 mm25 \times 10^4 \text{ mm}^25×104 mm2
5×106 mm25 \times 10^6 \text{ mm}^25×106 mm2
5×109 mm25 \times 10^9 \text{ mm}^25×109 mm2