Answer :
The answer is c// 24 hours in a day eliminates a and d and 24 times 7 is 168
Answer: C. 168w+24d
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Work Shown:
w = number of weeks
d = number of days
1 day = 24 hours
1 week = 7 days
1 week = 7*24 hours = 168 hours
If 1 week is 168 hours, then w of them leads to 168w hours. The w is simply a placeholder for a number. For example, if 2 weeks go by, then w = 2 and 168*w = 168*2 = 336 hours have elapsed.
Then we add on 24d to represent the number of hours after d days have passed by. The variable d is the number of days. Like w, the variable d is also a placeholder.
We add up 168w and 24d getting 168w+24d. We don't have any like terms to combine, so we leave this as is.