Customers of a phone company can choose between two service plans for long distance calls. the first plan has no monthly fee but charges $ 0.17 for each minute of calls. the second plan has an $ 18 monthly fee and charges an additional $ 0.12 for each minute of calls. for how many minutes of calls will the costs of the two plans be equal?

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