Hot Air Balloon
By Regan K and Jack T(Vanilla Thunder)
How high was the balloon 5 minutes before it was sighted?
How long does it take for the balloon to reach an altitude of 20 feet?
It takes 60 minutes for the second balloon to land and 40 minutes for the first balloon to land. The second balloon lands 20 minutes after the first. The slopes are the same for the first and second balloon, because they are decreasing at different rates.
It takes 26.67 minutes for balloon to land. The difference between the second and first balloon are 33.33. The third balloon is decreasing at a faster rate, so the slope is steeper.
The first and fourth will be the same altitude at 480 feet, and 16 minutes. In the graph below the purple line represents the first balloon, and the red line represents the fourth balloon. The lines intersect at the cordinates, 16,480.