Seven friends went out for lunch. the total Bill for their meals was $621.they decided to split the cost of the meals equally. about how much money did each friend contribute to the bill?

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 . reset next