A region with a 4-mile radius has a population density of about 6366 people per square mile . Find the number of people who love in the region

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

Ashley recently opened a store that sells only natural ingredients. she wants to advertise her products by distributing bags of samples in her neighborhood. it takes one person 22 minutes to prepare one bag. how many hours will it take to prepare 900900 bags of samples if ashley and 55 of her friends do the work?

Marcy is conducting a study regarding the amount of time students at her school spend talking to friends online. which group would give marcy the best results for her study?