Answer:
[tex]1600.2[/tex] calories
Explanation:
Given
Weight of Mark [tex]= 254[/tex] pounds
Rate at which Mark burns calories [tex]= 1.2[/tex]kcal/pound/hour
Total time in one week in terms of hours [tex]= 45 * 7[/tex] minutes
[tex]= 315[/tex] minutes
Number of hours in [tex]315[/tex] minutes is equal to
[tex]\frac{315}{60} \\= 5.25[/tex] hours
So, the total number of calories burned by Mark in one week
[tex]= 1.2 * 5.25 * 254\\= 1600.2[/tex] calories