With the concept of zero, we could express math (and by extension, everything) with just one concept: of there being something. This was contrasted with there not being something.
This presence/absence of something is very easily implementable in mechanical terms, which contributed to the development of hardware. So: the concept of 0 made our calculations easily physically implementable.
Answer:
Population ageing in Europe is caused primarily by three factors: declining fertility rates, increased life expectancy, and migration. The causes of population ageing vary among countries. I hope this helps
Explanation:
number 3: Migration of people
Answer: Randomly audit EHR documentation for patients readmitted within 30 days.
Explanation: To determine if hospital policies are being followed, a random judicial examination of electronic health records (EHR) is the best. This is because the probability of getting an accurate result is high since it's just a random sample.