Which two features are present in a plant cell but not in an animal cell

Wrote and expression for the difference of p and 4

Barney & noblet customers can choose to purchase a membership for $25 per year members receive 10% off all store purchases 1. how much would a member pay per year if he bought $50 worth of items each year? 2. write a slope-intercept equation that expresses how much a member pays per year using x to represent his purchases per year 3. how much would a member have to spend per year to pay off his membership fee?

Find the volume of the solid bounded by the plane z=0 and the paraboloid z=1-x^2 –y^2