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The floor of a moving van is 3 feet off of the ground. The ramp into the van makes a 22. 3 angle with the ground. How long is the ramp?


12. 0 feet


7. 3 feet


3. 2 feet


7. 9 feet

Respuesta :

sqdancefan

Answer:

  (d)  7.9 ft

Step-by-step explanation:

The geometry of the problem can be represented by a right triangle whose hypotenuse is the ramp, and the side opposite the given angle is 3 feet. Then the relevant trig relation is ...

  Sin = Opposite/Hypotenuse

Solving for Hypotenuse, we find ...

  Hypotenuse = Opposite/Sin

  ramp length = (3 ft)/sin(22.3°) ≈ 7.9 ft

The ramp is about 7.9 feet long.

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