Answer:
29 Degrees Fahrenheit
Explanation:
So at 4,000 ft. high, it's 50 Degrees Fahrenheit, that means we don't need the first 4,000 because 50 is our starting point. 10,000 - 4,000 = 6,000.
Every 1,000 ft. is down another 3.5 Degrees Fahrenheit, and so first we divide 6,000 by 1,000 to have 6.
Then we multiply 3.5 with 6 to get 21 Degrees Fahrenheit.
50 - 21 = 29 Degrees Fahrenheit.