John builds a model rocket that can travel 500 ft in the air. He builds a second rocket that can travel twice as high. What is the combined height of the two rockets?
Thoughts? Step-by-step reasoning:
User
The second rocket goes 500 * 2 = 1000 feet. So the total height is 500 + 1000 = 1500 feet.
Thus, the answer is 1500.
Assistant