Could someone please explain this?
A 14-ft-long ramp rises at an angle of 22.2°. How long is the base of the ramp to the nearest foot? (1 point)

11 ft
13 ft
17 ft
22 ft

Question

Could someone please explain this? 
A 14-ft-long ramp rises at an angle of 22.2°. How long is the base of the ramp to the nearest foot?  (1 point)

    11 ft
    13 ft
    17 ft
    22 ft

stamp · Answer

|dw:1361438394779:dw|

anonymous · Answer

Still don't get it.

directrix · Answer

cosine of (22.2 degrees) = b / 14
Solve for b.
@Channi

directrix · Answer

cosine of (22.2 degrees) = ?   @Channi

anonymous · Answer

0.92 apparently. Okay well that's wrong, I'll go ahead and give you a metal. If I'm too stupid see what I assume is obvious here, surely I deserve to get it wrong. Good day to you people.

directrix · Answer

cosine of (22.2 degrees) = b / 14

The choice of the cosine function to solve this problem comes from the diagram which @stamp drew above.

directrix · Answer

Enter "cosine of 22.2 degrees" in the Google search box, and the Google calculator will pop up and render 0.9258 (approx) as the result.

directrix · Answer

cosine of (22.2 degrees) = b / 14
.9258 = b/14
b = .9258* 14
b = 12.97 or 13 feet to the nearest foot  @Channi

anonymous · Answer

Wow! That was a lot simpler than I thought it was. Was I seriously not substituting. Damn. Thank you :)

directrix · Answer

We were glad to help, @Channi .