Two airplanes leave an airport at the same time and travel opposite directions. one plane travels 81 km/h slower than the other. if the two planes are 6140 km apart after 4 hours, what is the rate of each plane?

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