In your question where there is an acres which has a circular irrigator with a center pivot and covers 20 acres in the farm, the ask is how long is the irrigation boom in feet from the center to its farthest extent. The best answer that i could give is 526.6 feet.
8 t ^ 2 + 4 t ^ 2 - 8 4 t
The polynomial x3+8 is equal to (x+2)(x2-2x+4)
Selection B is appropriate.
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It takes 12 times as long to fill the whole tank as it does to fill 1/12 of the tank.
.. 12 * (1/3 hour) = (1/3)*12 hour
Minuim i think because maximum is not right
