There are 60 minutes in one hour
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there are 4,920 seconds in 1 hour 22 min.
60 minutes make up one hour.
75 Since one hour has 60 min, all you have to do is add 15 min and that equals 75 min.
There are 90 minutes in an hour and a half.
if bacteria Miltie by 2 every 20 min for and 10 hour how many will it be