Jed rode his scooter to school at 12 miles per hour and then jogged back at 6 miles per hour. If the round trip took him 6 hours, how far was it to school?

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