4m + 9 + 5 - 12 = 42
4m + 2 = 42
4m = 40
m = 10
1 hour = 60 minutes
60 minutes / 15 minutes = 4
2x4= 8 miles
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Answer:
9√15·cis(19π/24)
Step-by-step explanation:
The magnitudes multiply and the angles add:
= ((3√3)(3√5))·cis(π/8 +2π/3)
= 9√15·cis(π(1/8 +2/3)) = 9√15·cis(π(3/24 +16/24))
= 9√15·cis(19π/24)