60 points, ! find & explain an irrational number between 7.7 and 7.9 explain the equation that shows it is an irrational number. i want every single step

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?