To calculate the total nmber of hours, we will simply add
[tex]3\frac{2}{3}+6\frac{1}{4}[/tex]Let's add the whole number part, then add the fraction part
That is;
[tex]3+6+\frac{2}{3}+\frac{1}{4}[/tex][tex]=9+\frac{8+3}{12}[/tex][tex]=9\frac{11}{12}\text{ hours}[/tex]The above is the total number of hour she spent.