What is the recursive rule for this geometric sequence?

3, 3/2, 3/4, 3,

choices -
a1= 1/2; an = 3/2 x an - 1
a1= 3/2; an = 1/2 x an -1
a1= 3; an = 1/2 x an -1
a1= 1/2; an = 3x an -1

explain your answer, if you can

Write a real-world solution that can be represented by the equation y = 7x be sure to explain what the variables represented in the solution

Refer to interactive solution 17.45 to review a method by which this problem can be solved. the fundamental frequencies of two air columns are the same. column a is open at both ends, while column b is open at only one end. the length of column a is 0.504 m. what is the length of column b?

Arectangle plot measure 20ft. by 30ft. a 3-ft.-wide sidewalk surrounds it.find the area of the sidewalk.