What type of sampling method is described below? Based on a survey of 8500 randomly selected alumni, a major university estimated that the annual salary of its alumni was $125,000 per year.

Write the rational number in lowest terms 99/-15

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

Asporting good store is offering 30 percent off of the original price(x) of football cleats. the discount will be reduced by an another $7 before sales tax.