The speed of light in plastic is 2.0 x 108 m/s. Calculate the index of refraction for
plastic.

216 m/s

I probably might me wrong but whatever!

n=c/v.

1.5=3×10^8/v

v=3×10^8/1.5

v=2×10^8 m/s

Hope this helps :)

answer; i believe that the correct answer is (a); a large rock being weathered by wind and rain;

look at the !

pleaze mark brainliest!