There are 5 decades in half a century.
A decade is 10 years so eight and a half decades is 85 years.
300 months
your head
45 years
3 decades = 3 x 10 = 30 years
There are 15,268,000 minutes in 3 decades
30
30 years
a decade is 10 years long therefore 3 decades would be 30 years
If you mean 3/10 of a century then there are 3 decades A decade is 10 years and a century is 100 years
There are about: 3*10*52 = 1560 weeks