An apron with a $0\mathrm{.}5$mm lead equivalent thickness typically attenuates scattered $100$ kVp x$-$rays by what amount? $($HVL of lead is $0\mathrm{.}12$mm$)$

 A$.50\%$  B$.75\%$  C$.90\%$  D$.95\%$  E$.100\%$  

Answer rating: 100% (QA)

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