The pythagorean theorem is a² + b² = c². solve for b. b=±c+a−−−−√ b=±c2−a2−−−−−−√ b=±c2+a2−−−−−−√ b=±c−a−−−−√

As we have to solve for b, it means we have to isolate b

So first of all subtract from both sides

So we get

Now we need b , but its b^2 , so we can take square root on both sides.

taking square roots on both sides

Hence option B is correct

4.6875 pounds

step-by-step explanation:

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