Which of the following equations uses the commutative property of addition to rewrite 1/4 + 2/5? 1/4 + 2/5= 5/20 + 8/20
2/5 + 1/4= 13/20
13/20 - 2/5= 1/4
2/4 + 1/5= 14/20​

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?