Determine $F_B.$

Express your answer using two significant figures.

Two snowcats tow a housing unit to a new location at McMurdo Base, Antarctica, as shown in the figure$($Figure $1).$ The sum of the forces vec$(F{)}_A$ and vec$(F{)}_B$ exerted on the unit by the horizontal cables is parallel to the line L $,$ and $F_A=4300N.$

Figure

$1$ of $1$

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Part B

Determine the magnitude of vec$(F{)}_A+$vec$(F{)}_B.$

Express your answer using two significant figures.

$|vec(F{)}_A+$vec$(F{)}_B|=$