What is the sum of the geometric sequence 2,8, if there are 8 terms?

a. 21845
b. 43690
c. 65535
d. 87380

Cam bought some used books for $4.95. he paid $0.50 each for some books and $0.35 each for the others. he bought fewer than 8 books at each price. how many books did cam buy?

Aswimming pool had 2.5 million liters of water in it. some water evaporated, and then the pool only had 22 million liters of water in it. what percent of the water evaporated?

Which of the following is the sum of 3 1/6 + 6 3/8?