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Question

The above scatter-plot shows the relationship between air pressure and elevation. Elevations 8,000 meters are said to be in the "death zone", because percent of oxygen become very less. Find the percent of sea level pressure at the threshold of death zone.

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A
35%
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B
50%
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C
74%
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D
92%
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Solution

The correct option is A 35%

1meter=3.28ft
The death zone threshold is given in meters, but elevation is given in feet on the scatterplot. This means we need to convert the death zone threshold from meters to feet. Use the factor-label method to assemble a quick calculation:
8000×3.28ft1m=26,240ft
Locate 26,240ft on the x-axis of the scatterplot, and then identify the corresponding pressure on the y-axis, which is 35%.

1239248_479511_ans_b922600cc68a41d388ec3f389698b07e.jpeg

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