ANSWER:
65 hours.
Explanation:
The first thing is to calculate the number of hours a week, knowing that you spend 5 hours and 25 minutes per day.
A week, he works two days, so a week would be 10 hours and 50 minutes.
Now, it is 6 weeks therefore, we must multiply by 6 the time spent weekly, like this:
![\begin{gathered} 10\text{ h}\cdot6=60\text{ h} \\ 50\text{ min }\cdot6=300\text{ min}\cdot\frac{1\text{ h}}{60\text{ min}}=5\text{ h} \\ \text{ therefore, in total:} \\ t=60+5=65\text{ h} \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/tohtsyb01ufciznpaov2nhr0lqiz7l51fd.png)
Mark has gardened for 65 hours.