Which of the following is a geometric sequence? ​

Rachel reads 1/5 of the pages of a book plus 12 pages on the first day. on the second day, she reads 1/4 of the remaining pages plus 15 pages. on the third day, she reads 1/3 of the remaining pages plus 18 pages. on the fourth day, she reads the remaining 70 pages. how many total pages are in the book?

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?

The table shows the balance of a money market account over time. write a function that represents the balance y(in dollars) after t years.