Can you show me how to answer this question as i will be doomed from maham if i do not answer it

mahampottygirl exams

question 5c of exam paper:

a cat eats 3/4 of cat food every day. how long would 12 tins of cat food last.

Fatima plans to spend at least $15 and at most $20 dollars on sketch pads and pencils. if she buys 2 sketchpads, how many pemcils can she buy while staying in her price range? fatima can buy between and pencils. ? (type whole numbers. use ascending? order.)