ANSWER:
15.75
Explanation:
The week mentioned, is the first week, we add each day to where you volunteered, we must convert each number in its decimal form and then add, like this:
![\begin{gathered} 3=3.0 \\ \\ 3.75=3.75 \\ \\ 4(1)/(4)=4.25 \\ \\ 4(45)/(60)=4.75 \\ \\ t=3+3.75+4.25+4.75 \\ \\ t=15.75\text{ hr} \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/d3kqkzst0l1pbbxadyu1nhdet3z3r8qgau.png)
Therefore, Julia’s total volunteer hours for the week of July 2 to 8 is 15.75