Find the center and the radius (x-2)squared + (y-5)squared = 49

What is coefficient of the term of degree of degree 5 in the polynomial below

The population of a small rural town in the year 2006 was 2,459. the population can be modeled by the function below, where f(x residents and t is the number of years elapsed since 2006. f(t) = 2,459(0.92)

State one method by which you can recognize a perfect square trinomial.