$\"\"$

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The Pressure function is $\"\"$ .

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Where the height $\"\"$ is measured in kilometers.

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(a)

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Find the height of aircraft $\"\"$ , when the atmospheric pressure is $\"\"$ millimeters.

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Substitute $\"\"$ in $\"\"$ .

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$\"\"$

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$\"\"$

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From the definition $\"x$ if and only if $\"y$ .

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$\"\"$

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$\"\"$

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$\"\"$

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The height of aircraft is $\"\"$ kilometers.

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$\"\"$

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(b)

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Find the height of mountain $\"\"$ , when the atmospheric pressure is $\"\"$ millimeters.

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Substitute $\"\"$ in $\"\"$ .

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$\"\"$

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$\"\"$

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From the definition $\"x$ if and only if $\"y$ .

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$\"\"$

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$\"\"$

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$\"\"$

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The height of mountain is $\"\"$ kilometers.

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$\"\"$

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(a) The height of aircraft is $\"\"$ kilometers.

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(b)The height of mountain is $\"\"$ kilometers.