4. Joshua is planning to attend a seminar on mathematics teaching methodologies at 3:50 p.m. If the trip will take Joshua 48 minutes to get to the seminar venue, at what time must Joshua leave work? Show all your calculations and indicate your answer in 24 notation. (5)

Answer 1

To determine at what time Joshua needs to leave work, we need to subtract the travel time from the time of the seminar.

1. The seminar starts at 3:50 p.m..
2. The travel time is 48 minutes.

To find the time to leave, we can perform the following calculation:

• Subtract the travel time (48 minutes) from the seminar time (3:50 p.m.).

First, we convert 3:50 p.m. to 24-hour notation:

• 3:50 p.m. = 15:50

Next, we perform the subtraction:

• 15:50 - 00:48 (travel time)

We can break this down step by step:

• Start with the minutes:
  • 50 minutes - 48 minutes = 2 minutes
• Now, look at the hours:
  • Since we didn't need to borrow any minutes, the hours remain the same.
  • 15 hours - 0 hours = 15 hours

Now we can combine the results:

• 15 hours and 2 minutes = 15:02

Therefore, Joshua must leave work at 15:02 in 24-hour notation.