Final answer:
The height of the balloon after 30 seconds is 92 feet.
Step-by-step explanation:
The height of the balloon after 30 seconds can be found by substituting t = 30 into the equation h = 3t + 2:
h = 3(30) + 2
h = 90 + 2
h = 92 feet
Therefore, the height of the balloon after 30 seconds is 92 feet.