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3 years ago

Question is in picture

Mathematics

1 answer:

stiv31 [10]3 years ago

5 0

Answer:

27.5

Step-by-step explanation:

pythagorean theorem. a^2+b^2=c^2.

so 12^2+b^2=30^2

meaning 144+b^2=900

900-144=756

square root 756

b=27.5

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