If the school follows the Day 1 timetable on Friday, calculate the total time allocated for subject A for the whole week (Monday to Friday).

• Subject A: 09:40 - 10:00
• Subject A: 12:21 - 13:40
• Subject A: 13:45 - 15:05

• Duration 1: $10:00 - 09:40 = 20 \text{ minutes}$
• Duration 2: $13:40 - 12:21 = 1 \text{ hour } 19 \text{ minutes}$
• Duration 3: $15:05 - 13:45 = 1 \text{ hour } 20 \text{ minutes}$

Total for one Day 1 = $20 \text{ minutes} + 1 \text{ hour } 19 \text{ minutes} + 1 \text{ hour } 20 \text{ minutes}$
Total for one Day 1 = $2 \text{ hours } (20+19+20) \text{ minutes}$
Total for one Day 1 = $2 \text{ hours } 59 \text{ minutes}$

Total for week = $5 \times (2 \text{ hours } 59 \text{ minutes})$
Total for week = $10 \text{ hours } (5 \times 59 \text{ minutes})$
Total for week = $10 \text{ hours } 295 \text{ minutes}$
Convert minutes to hours and minutes: $295 \div 60 = 4$ with a remainder of 55. So, $295 \text{ minutes} = 4 \text{ hours } 55 \text{ minutes}$.
Total for week = $10 \text{ hours } + 4 \text{ hours } 55 \text{ minutes}$
Total for week = $\boxed{\text{14 hours 55 minutes}}$

Start time: 08:40
End time: 15:05

To subtract, borrow 1 hour (60 minutes) from 15 hours:

The calculated duration is 6 hours 25 minutes. The learner claims 7 hours 45 minutes.

• The learner is incorrect.

2.5 Thato claims that if she leaves the school ten minutes after the end of the last period and travels $2\frac{1}{2}$ hours to get home, she will be at home at 17:30. Is Thato correct? Verify your answer with calculations.

The last period on the timetable ends at 15:05.

Leaves school = $15:05 + 10 \text{ minutes} = 15:15$.

$2\frac{1}{2} \text{ hours} = 2 \text{ hours } 30 \text{ minutes}$.

Arrival time = $15:15 + 2 \text{ hours } 30 \text{ minutes}$
Arrival time = $17:45$.

Thato claims she will be home at 17:30. The calculated arrival time is 17:45.

• Thato is incorrect.

2.6 Palesa attends the school with the time table above. If she takes 45 minutes to get ready for school, her bus takes 20 minutes to take her to school and she walks 5 minutes to her first class, at what time must she wake up?

The earliest first class on the timetable is 08:40.

Arrival at school building = $08:40 - 5 \text{ minutes (walk)} = 08:35$.

Departure from home = $08:35 - 20 \text{ minutes (bus)} = 08:15$.

Wake-up time = $08:15 - 45 \text{ minutes (get ready)}$
To subtract 45 minutes from 08:15, borrow 1 hour (60 minutes) from 8 hours:
Wake-up time = $(7 \text{ hours } (60+15) \text{ minutes}) - 45 \text{ minutes}$
Wake-up time = $(7 \text{ hours } 75 \text{ minutes}) - 45 \text{ minutes}$
Wake-up time = $7 \text{ hours } (75-45) \text{ minutes}$
Wake-up time = $7 \text{ hours } 30 \text{ minutes}$.
Palesa must wake up at $\boxed{\text{07:30}}$.