The population P of a certain country (in thousands) from 1999 through 2009 can be modeled by P(t) = −8.81t2 + 218.7t + 88,369, 9 ≤ t ≤ 19
where t is the year, with t = 9 corresponding to 1999

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

What is the gcf of 20c^3-5c^4+30c^6

Bc and bd are opposite rays. all of the following are true except a)a,b,c,d are collinear b)a,b,c,d are coplanar c)bc=bd d)b is between c and d