Perform the indicated operation, being careful not to leave more than 59 seconds or 59 minutes in your answers.
4 hours, 26 minutes, 50 seconds
+2 hours, 53 minutes, 27 seconds
A. 7 hours, 20 minutes, 17 seconds
B. 6 hours, 79 minutes, 17 seconds
C. 7 hours, 19 minutes, 17 seconds
D. 6 hours, 20 minutes, 17 seconds

Question

UpStudy AI · Accepted Answer

1. First, add the seconds:  
   $$
   50 + 27 = 77 \text{ seconds}.
   $$  
   Since 77 seconds is more than 59, convert it:  
   $$
   77 \text{ seconds} = 1 \text{ minute } + 17 \text{ seconds}.
   $$

2. Next, add the minutes (including the carried over minute):  
   $$
   26 + 53 = 79 \text{ minutes}.
   $$  
   Adding the carried over minute gives:  
   $$
   79 + 1 = 80 \text{ minutes}.
   $$  
   Convert 80 minutes to hours and minutes:  
   $$
   80 \text{ minutes} = 1 \text{ hour } + 20 \text{ minutes}.
   $$

3. Finally, add the hours (including the carried over hour):  
   $$
   4 + 2 = 6 \text{ hours}.
   $$  
   Adding the carried over hour gives:  
   $$
   6 + 1 = 7 \text{ hours}.
   $$

Thus, the sum is:  
$$
7 \text{ hours, } 20 \text{ minutes, } 17 \text{ seconds}.
$$

Answer: A. $$7 \text{ hours, } 20 \text{ minutes, } 17 \text{ seconds}$$.
The sum is 7 hours, 20 minutes, and 17 seconds.

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