What is (d^1 3^1 d^3)^2

The graph shows the distance y, in inches, a pendulum moves to the right (positive displacement) and to the left (negative displacement), for a given number of seconds x. how many seconds are required for the pendulum to move from its resting position and return? enter your answer in the box.

Select the sequences that are geometric.

If each bricks costs and he can only buy one brick how much will it cost him to get the material to put around the outside of his garden?