L8 When visiting Planet Xenon We noticed that the national inhabitants had a system of numeration identical in structure to ours except that they used only the digits 0, 1, 2, 3, 4, 5, 6 and 7.
a. How many fingers did they have on each hand?
b. How could they represent our 100 in their system?

please answer and show your thinking

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.