A Glass Factory Needs Glass for Beakers That Are $95.5 \%$

Short Answer

A glass factory needs glass for beakers that are $95.5 \%$ silica and $4.50 \%$ boron. How much silica must be added to a mixture that is $10.1 \%$ boron and $89.9 \%$ silica to make a $105 \mathrm{~kg}$ supply of glass?