The word is nurse. A nurse is a person who is trained to take care of sick people.
There have been people in Australia for tens of thousands of years. No one knows the name of the very first person in Australia.
It is impossible to tell, but is probably in the tens to hundreds of thousands.
Tens
30 tens does not equal 3000.
A lighthouse keeper.
There are tens of stadiums.
tens
From the beginning of the human race, many tens of thousands of years ago, whenever people have been sick or injured, somebody has had ideas on how to cure them. This gradually coalesced into the idea of a particular set of people with the task or profession of curing, and formal qualifications needed to belong to that set of people.
tens of millions
it means to estimate a number by tens
Tens
tens apex-