Aconcrete stepping stone measures 20square inches. what is the area of 30 such stones

How do i do this activity, is appreciated

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

Find the distance between the pair of points a(-1,8) and b(-8,4)