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coldgirl [10]
3 years ago
8

To approach the runway, a pilot of a small plane must begin a 10° descent starting from a height of 1983 feet above the ground.

To the nearest tenth of a mile, how many miles from the runway is the airplane at the start of this approach?
Mathematics
2 answers:
Papessa [141]3 years ago
7 0
The ratio of vertical distance to horizontal distance is the tangent of the angle.
  tan(10°) = (1983 ft)/(horizontal distance in ft)
Then
  (horizontal distance in ft) = (1983 ft)/(tan(10°)) ≈ 11,246.15 ft
The horizontal distance in miles is found using the appropriate conversion.
  (horizontal distance in mi) = (horizontal distance in ft)*(1 mi)/(5280 ft)
  = 11,246.15/5280 mi ≈ 2.129953... mi

The airplane is approximately 2.1 miles from the end of the runway.
balu736 [363]3 years ago
3 0
The plane must be 3.38 miles away from the runway to begin the descent.  The equation I used was "y = -0.1111111x + 0.3755682", 0.37~ being the height in feet (in miles) and -0.11~ being the descent.  The x-intercept is located at 3.38.
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