Use the Binomial Theorem to find the specified term of the given power of a binomial. (Remember that r starts at 0 in the Binomial Theorem, so finding, say, the second term means that r = 1.) Find the fourth term in the expanded form of (4x-2y)^5

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?