I’m being timed pls help which expression is equivalent to the given expression 3 √125

a) 4 √2
b) 6 √5
c) 15 √5
d) 6 √3

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?