Final answer:
Mr. Khan's estimate of working 2,500 hours a year is close, but he actually works 2,400 hours a year, overestimating by 100 hours.
Step-by-step explanation:
The question is asking to validate Mr. Khan's estimate of working 2,500 hours a year against his actual schedule. To assess the accuracy of his estimate, we use basic multiplication to calculate the total working hours:
- Hours per day: 10 hours
- Days per week: 5 days
- Weeks per year: 48 weeks
By multiplying these figures:
10 hours/day × 5 days/week × 48 weeks/year = 2,400 hours/year
The actual total hours Mr. Khan works in a year is 2,400, which is slightly less than his estimate of 2,500 hours. Therefore, his estimate is close but overstates the actual amount by 100 hours.