Answer:
479 ft
Step-by-step explanation:
speed = 72 ft/sec
speed = distance/time
distance = speed * time
In 6 seconds, time = 6 sec
distance = speed * time
distance = 72 ft/sec * 6 seconds
distance = 432 ft
The helicopter travels to a height of 432 ft above the roof of the building in 6 seconds, but since it started at 47 ft above ground, the total distance above ground after 6 seconds is
47 ft + 432 ft = 479 ft
Answer: 479 ft
