Algebra 2, Geometric and Arthmetic sequences

1.Insert two geometric means between 3 and 42. This problem requires which formula?

a. Arithmetic sequences c. Arithmetic series

b. Geometric sequences d. Geometric series

2. A certain tech stock’s value doubled each day over a period of two weeks. The original value was $1.20. What was the value of the stock of the fourteenth day.

This problem requires which formula:

a. Arithmetic sequences c. Arithmetic series

b. Geometric sequences d. Geometric series

3. After the winter snows, the dam operators at a certain dam had to release water each day to protect the dam from overflowing from the snow melt. The first day, they released 1500 gallons of water. Each day, they released 1.3 times as much as the day before. On the fifteenth day, how many total gallons had been released?

9. Find the sum of the first 29 terms:

4, 8, 16, 32….

And i'm Amanda by the way. :0) it's a pleasure to meet yall.