Final answer:
The car will spend approximately 1 hour and 35 minutes going at a speed of 55 miles per hour.
Step-by-step explanation:
To solve this question, we can use the formula Time = Distance / Speed. We are given that the car spends 2.5 hours going 35 miles per hour. Let's calculate the distance traveled: Distance = Speed x Time = 35 mph x 2.5 hours = 87.5 miles. Now, we need to find out how long it will take to travel 87.5 miles at a speed of 55 miles per hour:
Time = Distance / Speed = 87.5 miles / 55 mph = 1.59 hours.
Therefore, the car will spend approximately 1.59 hours or 1 hour and 35 minutes going at a speed of 55 miles per hour.