How do you determine the perimeter of a polygon

Atown has a population of 17000 and grows at 2.5% every year. to the nearest year, how long will it be until the population will reach 19600?

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

In which expression is 13y a term? a- 13y/4 −2y b- 8+13y −yz c- 4+ 13yz d- 13+y