20 years.
Decades is a Greak word. (δεκάδες) It means ''ten of something''. If you want to say 'ten years'' its ''decaetia'' , the prefix deca- meaning ten and -etos meaning year.
It means that it lasted that long.
4.5 decades equals 4.5 decades!
No, you don't need a hyphen. It would be 10 decades or ten decades.
"Out" is traditionally an adverb, but in recent decades it has also been used as a verb, meaning to reveal a characteristic that has previously been hidden.
"Out" is traditionally an adverb, but in recent decades it has also been used as a verb, meaning to reveal a characteristic that has previously been hidden.
100 decades in a millennium
There are 3.5 decades in 35 years
30 decades
There are 10.6 decades. Or 10 decades plus 6 years.
16.7 decades