First, we need to determine how many feet Ian runs in a week. We begin this by multiplying the number of laps by the number of feet per lap, performing 5*100= <<5*100=500>>500 feet per day.
Since there are 5 days in the period being measured, this means Ian runs 500*5= <<2500=2500>>2500 feet jogged.
Since it takes 25 feet of jogging to burn a calorie, this means Ian burns 2500/25=<<2500/25=100>>100 calories burned jogging throughout the week.
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