Answer:
3875 feet above sea level
Step-by-step explanation:
We first start at 7,000 feet above sea level, we then descend 4,500 feet closer to the sea level, therefore:
Then we go up 1,375 feet farther from the sea level, so:
1. all real numbers
2. y > 0
3. approaches y = 0
500
hope it helps you
tic tac toe