A school canteen offers a prepaid lunch card. Each card is loaded with a fixed balance of Rs 300. Each day a meal costs Rs x. The canteen wants to ensure that a student can eat for at least 12 school days on a single card.
a. (i) Set up an inequality in x that represents the above requirement.
b. (ii) Solve the inequality obtained in part (i) and express the answer in interval notation.
c. (iii) Represent the solution set on a number line, clearly indicating open or closed endpoints.