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30 January, 23:00

If a road has a grade of 30°, this means that it's angle of elevation is 30°. If you travel 1.5 miles on this road, how much elevation have you gained in feet (5280 ft = 1 mile) ? Round to the nearest foot.

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  1. 30 January, 23:18
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    3960 feet.

    Step-by-step explanation:

    sin 30 = elevation / hypotenuse

    sin 30 = e / 1.5

    e = 1.5 * sin 30

    e = 1.5 * 0.5 = 0.75 miles

    = 0.75 * 5280

    = 3960 feet.
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