To find the total number of sit-ups Ishaan did in 29 days, you can multiply the number of sit-ups he did each day by the number of days:
Total sit-ups = Sit-ups per day × Number of days Total sit-ups = 148 sit-ups/day × 29 days
Calculating that:
Total sit-ups = 148 × 29 = 4,292 sit-ups
So, the correct answer is:
4,292 sit-ups.