3.5 hours.
There are 30/24 = 1.25 days
30 hours 1.25 days 0.041666 months 0.00342465753 years
150
330 minutes is 5 hours and 30 minutes.
2.5 hours is exactly 2.5 hours!
There are 60 minutes in one hour. Therefore, 30 hours is equal to 30 x 60 = 1800 minutes.
2 hours
210 = 60 + 60 + 60 + 30
30 days equates to 720 hours @24 hours per day.
150 minutes
I assume 0.5 hours. 0.5 hours is 30 minutes