2--5(10-4-2)+(30-3) The first two is supposed to have a 4 on top but it didn't show it and that 4 is supposed to have a 2 and that last 3 is supposed to have a 3 so can someone please give me the answer to that

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