Final answer:
The temperature at 4,000 feet of altitude will be 57.4 degrees considering a 1.7 degrees drop for every thousand feet.
Step-by-step explanation:
To answer this question, we need to use the information given. We know that the temperature drops by 1.7 degrees for every thousand feet of altitude. The airplane is going to 4,000 feet of altitude, so the temperature will drop by 1.7 degrees * 4 = 6.8 degrees. The starting temperature was 64.2 degrees, so we subtract this drop in temperature to find our answer.
Therefore, the temperature at 4,000 feet will be 64.2 degrees - 6.8 degrees = 57.4 degrees.
Learn more about Temperature Change with Altitude