Find the values of the variables

Need plz been trying to do it for a long time and still haven’t succeeded

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?

2,10,-50 next two numbers geometric sequence