Question

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Answer 1

Answer:

7 mm

Step-by-step explanation:

$\frac{7 \sqrt{2} }{ \sin(90) } = \frac{j}{ \sin(45) } \\ \frac{7 \sqrt{2} }{1} = \frac{j}{ \frac{1}{2} \sqrt{2} } \\ j = 7 \sqrt{2} \times \frac{1}{2} \sqrt{2} \\ j = 7$