Answer:
the answer for you to know the status report playback issue me with Ananya hot to me I am not sure if it helps you
Density is mass per volume 
With data: 
.
Hope this helps.
Answer:
300
Explanation:
20% is 1/5
60 multipled by 5/1 is 300 people total
They would be concerned becuase they affect they area with the symptoms/problems and they would aid them because they are most ways common symptoms are found and usually help find more problems
