Write an integral using the order of integrationdzdxdyfor the volume of the solid tetrahedron withvertices (0,0,0), (0,0,1), (0,2,0), and (2,2,0). Be sure to sketch the region of integration.

Mary and roberto bought identical backpacks at different stores. mary's backpack originally cost $65 and was discounted 25%. roberto's backpack originally cost $75 and was on sale for 30% off on the original price. which backpack was the better buy?