Answer:
The mass of cocoa it contains is;
[tex]m=43.5\text{ grams}[/tex]Explanation:
Given that Kaitlin's chocolate bar is 63% cocoa.
If the weight of the chocolate bar is 69grams
The amount in grams of cocoa it contains is;
[tex]\begin{gathered} m=63\text{\% of 69 grams} \\ m=0.63\times69\text{ grams} \\ m=43.47 \\ m=43.5\text{ grams} \end{gathered}[/tex]Therefore, the mass of cocoa it contains is;
[tex]m=43.5\text{ grams}[/tex]