$(4)$
6. Commercial airplanes often fly around $30000 \mathrm{ft}$ above sea level. How many miles above sea level is $30000 \mathrm{ft}$, to the nearest tenth of a mile?
\[
\text { 30000 Et. }=
\]

Answer

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Answer

Calculate the result and round to the nearest tenth: $\boxed{5.7}$ miles

Steps

Step 1 ：Convert 30000 feet to miles: $\frac{30000}{5280}$

Step 2 ：Calculate the result and round to the nearest tenth: $\boxed{5.7}$ miles