Bill wieghs 120 pounds and is gaining ten pounds each month. phil weighs 150 pounds and is gaining 4 pounds each month. how many months, m, will it take for bill to weigh the same as phil

Rachel is studying the population of a particular bird species in a national park. she observes every 10th bird of that species that she can find in the park. her conclusion is that the birds living in the park who belong to that species generally feed on insects. rachel's sample is . based on the sample she picked, rachel's generalization is