Pleaasse I really need help on this question

first of all wow this is not the easiest. But i figured out some of it i hope this helps! :)

Step-by-step explanation:

100 cm=1 m

20 cm=30

1 m=2 hr and 30 minutes

for the prism i know what is missing( .80) is missing for the side. I really hope this helps i am sorry i could not figure out the rest.

  n=   0.0000 - 0.3750 i  

  n=   0.0000 + 0.3750 i

step-by-step explanation:

one of these should be correct