Final answer:
To arrive at the airport by 10 AM from a distance of 35 km, at an average speed of 70 km/h, you need to leave at 9:30 AM, which is 30 minutes before the desired arrival time.
Step-by-step explanation:
To determine what time you should leave your house to reach the airport at 10 AM, we need to calculate the travel time based on the distance to the airport and the average speed.
First, we calculate the travel time using the formula:
Travel Time = Distance ÷ Average Speed
In this case, the distance to the airport is 35 km and the average speed is 70 km/h. So the travel time is:
35 km ÷ 70 km/h = 0.5 hours
Since 0.5 hours is equivalent to 30 minutes, you need to leave 30 minutes before 10 AM to arrive on time. Therefore, you should leave your house at 9:30 AM.