What is the explicit rule for this geometric sequence?

2, 6, 18, 54, …

an=3⋅2^n

an=2⋅3^n

an=2⋅3^n−1

an=3⋅2^n−1

What is the measure of ac? 5 units 13 units 26 units 39 units 3x- 2b 6x + 9

Set up and solve a proportion for the following application problem. if 55 pounds of grass seed cover 404 square feet, how many pounds are needed for 7272 square feet?

1.based of the diagrams what is the the value of x? 2.how would you verify your answer for x