Someone help me with this plss

The last time i bought this product , it cost $20.00 but it looks like it cost 29. 60 today? what is the increase

The radius of a sphere is 3 inches. which represents the volume of the sphere?

Problem situation: caren is making rice and beans. she can spend no more than $10 on ingredients. she buys one bag of rice for $4.99. beans cost $0.74 per pound. how many pounds of beans, x, can she buy? inequality that represents this situation: 10≥4.99+0.74x drag each number to show if it is a solution to both the inequality and the problem situation, to the inequality only, or if it is not a solution.