Mô tả phương pháp chung của bài toán tìm khoảng ước lượng tham số. Giúp mình với ạ

The cost c, in dollars, for bananas depends on the weight w, in pounds, of the bananas. this situation is represented by the function rule c=0.5w (graph each function rule. tell whether the graph is continuous or discrete)

Problem melissa is her dad build a walkway in their backyard. the walkway will be 54 feet long and 1.5 feet wide. the local hardware store sells tiles which are 1.5 by 1.5 feet and come in boxes of 12. how many boxes of tiles do they need?

One integer is 8 times another. if the product is 72, then find the integers