Có công thức tính giá tiền taxi 4 bánh của hãng A như sau: P = 11000 + (x – 0,7).15800 + 3000.n với 0,8 ≤ x ≤ 30 Với P (đồng) số tiền phải trả; x(km) là số km quãng đường; n là số lần xe chờ mỗi lần 5 phút. a) Do xe hư nên anh Bình băt taxi của hãng A từ công ty về tới nhà. Trên đường đi anh có ghé vào siêu thị để mua đồ nên xe phải chờ khoảng 30 phút. Tính độ dài quãng đường biết số tiền anh phải trả là 318400 đồng. b) Có bảng giá dịch vụ xe ô tô 4 bánh của hãng B như sau: Giá cước tối thiểu Mỗi km tiếp Giá cước theo thời 2km đầu tiên theo gian di chuyển 27000 đồng 9500 đồng/km 400 đồng/phút Anh An băt xe đưa gia đình đi xem phim ở Galaxy Nguyễn Văn Quá, quận 12. Hỏi anh chọn hãng nào có lợi hơn biết quãng đường là 9,2km và thời gian đi dự kiến là 18 phút (làm tròn đến hàng nghìn); xe đi xuyên suốt đến nơi.

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