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Compared to the speed of light in air, the speed of light in water is SLOWER.

slower

Step-by-step explanation:

I already did this

it is slower

Step-by-step explanation:

I did this on ED

x = 7

Step-by-step explanation:

You need to figure which sides correspond and set up the proportions

Labeling the vertices of the triangles would help you.

I did that and found that 5x - 15 ↔ 10 since both of those sides are opposite the 42° angles and 36 ↔ 18

So

18(5x - 15) = 10(36)

90x - 270 = 360

90x = 630

x = 7