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AleksandrR [38]

3 years ago

8

Use U = {1,2,3,4,5,6,7,8,9,10}, A = {2,4,5}, B = {5,7,8,9}, and C = {1,3,10} to find the given set. AUB A. AUB = B. the solution

is the empty set

1 answer:

vesna_86 [32]3 years ago

3 0

Answer:B

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

Given information: |a| = 80, |b| = 50, the angle between a and b is 3π/4.

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$a\cdot b=|a||b|\cos \theta$

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Substitute the given values in the above formula.

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