Final answer:
The time taken for a microwave signal from Earth to reach a geostationary satellite situated 36,000 km above the Earth's equator is approximately 0.12 seconds.
Step-by-step explanation:
To calculate the time taken for a microwave signal from Earth to reach a geostationary satellite situated 36,000 km above the Earth's equator, we can use the formula:
Time = Distance / Speed
In this case, the distance is 36,000 km and the speed of light, which is the speed of electromagnetic signals, is approximately 300,000 km/s. Plugging these values into the formula, we get:
Time = 36,000 km / 300,000 km/s = approximately 0.12 seconds
Therefore, the correct answer is A) Approximately 0.12 seconds.