Need help with this was late for class.

Which exponential function has an initial value of 2? f(x) = 2(3x) f(x) = 3(2x)

Answer! if you don’t mind, can you explain

Technicians have installed a center pivot, circular irrigator for a farm that covers 25 acres. a.) how long is the irrigation boom (in feet) from the center pivot to its farthest extent? b.) if the irrigation boom makes 4 full revolutions in a day, how many miles does the end of the boom travel in 5 days?