Decrease 250 by 70
with full working

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

What situation is an example of an observational study

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?