2
You can spell it out as you did or you can simply write "2".
You would write it as "2 hours"
It is +2
There is no need to write the leading 0s. So just 2 will suffice.
230 microcuries
AM241 250 microcuries
according to hormones test
a gram of natural uranium having various isotopic makeups has a radioactivity of about .67 microCuries. One Curie is equal to the radioactivity possessed by a gram of radium.
2
You can spell it out as you did or you can simply write "2".
You would write it as "2 hours"
The LD50/50 (50% mortality in 50 days) for strontium-90 in rats is estimated to be around 2.5 to 3 microcuries per gram of body mass. I do not know if that translates linearly to humans.
Write 5' 2" or 5 feet 2 inches.
2 cups = 1/2 quart
You could write 2 1/2 or 2.5.
This is how you write an equivalent fraction:2/4=1/2