Xây dựng khoảng ước lượng đối xứng cho tỷ lệ tổng thể, trình bày bài toán tìm cỡ mẫu tối thiểu trong ước lượng khoảng cho tỷ lệ tổng thể.

Tom wants to order tickets online so that he and three of his friends can go to a water park the cost of the tickets is 16.00 per person there is also a 2.50 one-time service fee for ordering tickets online write an expression in term of n that represents the cost for n ordering tickets online

What is the 9th term in the geometric sequence described by this explicit formula? an=-6. (2)(n-1) apex

What is r i 4.5+10r=-6.5 with work pls