Perform the indicated operation, being careful not to leave more than 59 seconds or 59 minutes in your answers.
6 hours, 56 minutes, 25 seconds
-2 hours, 35 minutes, 56 seconds
A. 9 hours, 32 minutes, 21 seconds
B. 4 hours, 21 minutes, 29 seconds
C. 4 hours, 20 minutes, 29 seconds
D. 4 hours, 20 minutes, 31 seconds

Question

UpStudy AI · Accepted Answer

Given the subtraction
$$
6\text{ hours, }56\text{ minutes, }25\text{ seconds} - 2\text{ hours, }35\text{ minutes, }56\text{ seconds},
$$
we start with the seconds.

Since
$$
25 - 56
$$
is negative, we borrow 1 minute (which is $$60$$ seconds) from the minutes.

Now, the seconds become:
$$
25 + 60 = 85.
$$
Subtract the seconds:
$$
85 - 56 = 29 \text{ seconds}.
$$

After borrowing 1 minute, the minutes in the first time become:
$$
56 - 1 = 55 \text{ minutes}.
$$
Now subtract the minutes:
$$
55 - 35 = 20 \text{ minutes}.
$$

Finally, subtract the hours:
$$
6 - 2 = 4 \text{ hours}.
$$

Thus, the final result is
$$
4\text{ hours, }20\text{ minutes, }29\text{ seconds}.
$$

The correct answer is C.
4 hours, 20 minutes, 29 seconds

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