Amountain climber is at an elevation of 10,712 feet. after 4 hours, he is at an elevation of 8,884 feet. find the climber’s vertical speed using this formula:

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