Round 630.821430372 to the nearest whole number

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

Which expression is equivalent to7_/x^2 ÷ 5_/y^3? assume y# 0

Last one and the bottom answer choice is y=(x-4)^2+1 you guys!