Question

The tip of a 15-inch wiper blade wipes a path that is 35 inches long. What is the angle of rotation of the blade in radians to the nearest tenth?

Answer 1

How would I do this? Sorry to bother you again - @hartnn

Answer 2

I just need a formula

Answer 3

here s = length of arc = 35
r = 15

use
\(\Large s = r \theta \)

Answer 4

and you'll get theta in radians only :)

Answer 5

so s/r = 2.33

Answer 6

35 = 15 theta

theta = 35/15 = 7/3 radians
or
2.33 radians

Answer 7

thats the angle of rotation :)