Using disks or washers, find the volume of the solid obtained by rotating the region bounded by the curves y=x2, 0≤x≤5, y=25, and x=0 about the y-axis.

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?