Answer:
504 voice cracks per week
72 voice cracks per day
Explanation:
If Danny's voice cracks every 20 minutes, we can calculate the number of times his voice cracks in a day and in a week.
Number of times his voice cracks in a day:
There are 60 minutes in an hour, so there are 60/20 = 3 intervals of 20 minutes in an hour.
Since there are 24 hours in a day, Danny's voice cracks 3 times per hour * 24 hours = 72 times in a day.
Number of times his voice cracks in a week:
Since there are 7 days in a week, we can multiply the number of times his voice cracks in a day by 7.
Danny's voice cracks 72 times per day * 7 days = 504 times in a week.