Give one real life example of relation which is a function

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

Can someone explain to me how to do

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.