150 minutes
2 or 4.5 min.
2 + 2.5 = 4.5 minutes = 270 seconds
There are 150 minutes in 2+1/2 hours; there are 60 minutes per hour.
A bacteria splits in half after 20 minutes, so that after 20 minutes there are 2 bacteria, and after 40 minutes there are 4 bacteria. How many bacteria will there be after 2 hours?
150 minutes.
2160
60
60 minutes in an hour; 30 minutes in a half hour. 5 and 1/2 = 330 minutes
41/2 hours is 270 minutes.
150 seconds
1 hour = 60 minutes, 1/2 hour = 30 minutes! Therefore 1 and a half hour would equal 90 minutes! Can't you add?
There are 2 quarters hours in half an hour and a quarter of an hour is 15 minutes while half an hour is 30 minutes
Half an hour. 1/2 hour .5 hour
30 minutes ...There are 60 min in an hr, so a half an hr is 60/2 = 30 min.
1 degree = 60 minutes of arc 1/2 o = 60/2 ' = 30'
There are 10,5 minutes or 10 minutes and 30 seconds in 10 and a half minutes.