Answer:
40
Step-by-step explanation:
15x3 = 45
45-5 =40
Answer:
Refractive index of a medium depends upon the refractive index of the surroundings
To divide fractions you flip the second one and then multiply the new fractions
9 16 9 5 45
--- ÷ ---- = ---- × ------ = ------
2 5 2 16 32
then simplify
45/32= 1 13/32
I hope I've helped!