Explanation :
To calculate the total distance the hot-air balloon is above the ground, we need to find the difference between the distance traveled during the upward and downward motions.
During the upward motion, the hot-air balloon went up at a speed of 375 feet per minute for 5 minutes. Therefore, the distance traveled in the upward motion is 375 * 5 = 1875 feet.
During the downward motion, the hot-air balloon went down at a speed of 225 feet per minute for 6 minutes. Therefore, the distance traveled in the downward motion is 225 * 6 = 1350 feet.
The total distance the hot-air balloon is above the ground is given by the difference between the distance traveled in the upward and downward motions. So, the total distance is 1875 - 1350 = 525 feet.
Therefore, the hot-air balloon is 525 feet above the ground.