By one estimate, there are about 5.7×10^4 parks of various sizes in the United States. These parks host a total of 9.4×10^9 visitors per year. What is the average number of visitors per park per year?

I don't understand how to do this question.

It says factor each expression 49x-28?

Hii1977 cleaner shrimp are a species of shrimp that clean parasites from other organisms. fish allow the shrimp to eat the parasites in their mouth. the shrimp get a source of nutrition. the relationship between the shrimp and the fish is this association indicates that for the smaill aneser arecommensal,mutualistic,or parasitic for the begger one the anser are the shrimp and fish benefit each other , the shrimp harm the fish, or the fish do not benetit from the shrimp

Write and solve a real word problem that involves determining distance on a coordinate plane