Final answer:
The approximate height of the Eiffel Tower at -9 degrees Celsius is 320.805 meters, calculated by subtracting the expansion caused by the increase in temperature from the original height.
Step-by-step explanation:
The Eiffel Tower is made of steel and its height increases due to the thermal expansion when the temperature changes. Given that the temperature rises from -9 to 41 degrees Celsius, causing the Tower to grow by 19.5 cm, and the question is asking for the height at the lower temperature, we must subtract the expansion from the total height when the temperature is higher. Since the original height of the Eiffel Tower is 321 meters (32,100 cm), to find the approximate height at the lower temperature we perform the following calculation: 32,100 cm - 19.5 cm = 32,080.5 cm, which is 320.805 meters.