the total number of rotations cheeks needs to run is AT LEAST 45 so:
total number of rotation [tex] \geq [/tex] 45
there are already 6 rotations ran so r+6 = total number of rotation. that means we can rewrite the inequality as:
r+6 [tex] \geq [/tex]45
which is the first option.
let me know if you have any more questions!
