Giving brainliest answer. (trigonometry)

what is the rate of change from x = 0 to x = pi over 2?

8 over pi
pi over 8
-8 over pi
-pi over 8

Which shows the correct lengths of side c in both scales? scale 1: 45 m; scale 2: 60 m scale 1: 60 m; scale 2: 45 m scale 1: 36 m; scale 2: 27 m scale 1: 27 m; scale 2: 36 m mark this and return save and exit