Final answer:
To calculate Stephen's feet below ground level, multiply the height of each story (11 1/2 feet) by the number of underground levels he works at (2), resulting in 23 feet below ground elevation.
Step-by-step explanation:
The question asks us to calculate Stephen's feet below ground level given that each story in the hotel is 11 1/2 feet tall and Stephen works two levels underground. To do this, we must consider the height per story and multiply it by the number of below-ground levels Stephen works at.
The height of each story is 11 1/2 feet, which can be written as 11.5 feet in decimal form. Since there are two levels underground, we calculate Stephen's feet below ground level as follows:
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- Multiply the height per story (11.5 feet) by the number of underground stories (2).
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- The calculation is 11.5 feet/story × 2 stories = 23 feet.
Therefore, Stephen's feet below ground elevation is 23 feet.