Final answer:
After floating up 19 feet from its initial position of 23 feet below the tree limb, the balloon is 4 feet below the limb.
Step-by-step explanation:
The student's question pertains to finding out the position of a balloon relative to a tree limb if the balloon starts 23 feet below the tree limb and then floats up 19 feet. We begin by acknowledging that the balloon's initial position is -23 feet (since it is below the limb, we consider this as negative). Upon floating up 19 feet, we perform the arithmetic operation of adding +19 feet to the initial position.
The calculation is as follows: -23 feet + 19 feet = -4 feet.
Therefore, the balloon's final position relative to the tree limb is 4 feet below it, since the result is still negative, indicating that the balloon did not reach or surpass the height of the limb.