Question

The windshield wiper blade on Julia’s car is 21 inches long. Each swipe of the wiper makes an angle of 85 degrees as pictured below.
To the nearest inch, how far does the tip of the windshield wiper travel with each swipe of the blade?



  A    
21 inches


  B    
30 inches


  C    
31 inches


  D    
33 inches

Answer 1

I FOUND YOUR COMPLETE QUESTION IN OTHER SOURCES.
 PLEASE SEE ATTACHED IMAGE.
 For this case what you should do is find the arc length.
 By definition, the arc length is given by:
 s = R * theta
 Where,
 R: radio
 theta: angle
 Substituting values:
 s = (21) * (85 * (pi / 180))
 s = 31.15412715
 nearest whole number:
 s = 31 inches
 Answer:
 C
 31 inches