Using HE 1020', LE 865', and HD 2,210 meters, what is the calculated slope before rounding?

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Multiple Choice

Using HE 1020', LE 865', and HD 2,210 meters, what is the calculated slope before rounding?

Explanation:
The slope is found by comparing the vertical rise to the horizontal run, then converting that ratio to an angle with the arctangent. The vertical change between the two elevations is 1020 minus 865, which equals 155 meters. The horizontal distance is 2,210 meters. So the slope angle is arctan(rise/run) = arctan(155 / 2210) ≈ arctan(0.0701). The arctangent of 0.0701 in degrees is about 4.01 degrees, before rounding.

The slope is found by comparing the vertical rise to the horizontal run, then converting that ratio to an angle with the arctangent. The vertical change between the two elevations is 1020 minus 865, which equals 155 meters. The horizontal distance is 2,210 meters. So the slope angle is arctan(rise/run) = arctan(155 / 2210) ≈ arctan(0.0701). The arctangent of 0.0701 in degrees is about 4.01 degrees, before rounding.

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