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Nookie1986 [14]
3 years ago
11

PLEASE ANSWER + BRAINLIEST!!!

Mathematics
1 answer:
quester [9]3 years ago
6 0
Use the Cosine Rule

q^2 = 20^2 + 30^2 - 2^20*30 cos 15

       =  140.89

so q = sqrt 140.89 =  11.9 (answer)
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