Multiply (5x2 + x − 4)(x + 2). 5x3 + x2 − 4x − 8 5x3 + 11x2 − 2x − 8 5x3 + 10x2 − 4x − 8 5x3 + 20x2 + 2x − 8

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?