Question

: What is the value of the fourth term in a geometric sequence for which a^1 = 15 and r = 1/3
Express your answer as a fraction.
Answer:_______


: The second term in a geometric sequence is 12. The fourth term in the same sequence is 4/3. What is the common ratio in this sequence?
Answer:___________

: What is the sum of the first five terms of a geographic series with a^1 = 20 and r = ¼
Express your answer as an improper fraction in lowest terms without using spaces.
Answer:_____