10 + 2 = 9 + blank i need to know this cause i think its hard

Each morning papa notes the birds feeding on his bird feeder. so far this month he has see. 59 blue jays, 68 black crows, 12 red robin's and 1 cardinal. what is the probability of a blue jay being the next bird papa sees

Does the point (1, sqrt 7) lie on circle shown.

The function f(x) = 14,600(1.1)* represents the population of a town x years after it was established. what was the original population of the town?