Answer :
Final answer:
The original height of the helicopter was 469 meters. To find this, you add the final height after descending (306 meters) to the descent distance (163 meters), resulting in 469 meters. The correct option is (b).
Explanation:
To solve the original height of the helicopter, one needs to consider the final height after the helicopter descends and the amount it descended by. If the helicopter ends at 306 meters above ground and it descended 163 meters to get to that height, one simply needs to add these two values to find the original height.
The correct subtraction equation that models this problem is:
Original Height = Final Height + Descent Height
Therefore:
Original Height = 306 meters + 163 meters = 469 meters.
The subtraction equation provided in option c is incorrect because it does not align with the model that needs addition to find the original height.
The correct answer is: b) 469 meters; 306+163=original height
