Amotorboat takes 40 minutes to travel 20 miles downstream. the return trip takes 60 minutes. what is the speed of the current?

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