BEST ANSWER BRAINLIEST 147a) Identify the center, the vertices, and the foci of the ellipses:

4x^2+y^2−16x−6y+21=0

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?