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Mr. Kirby's physics class went to the football field to launch a rocket into the air. The rocket's height in feet, $f(x)$, depends on the number of seconds, $x$, that have elapsed since launch.$\newline$What does $f(8) = 0$ tell you?$\newline$Choices:$\newline$(A)The rocket starts its launch $8$ feet above the ground.$\newline$(B)After $8$ seconds, the rocket has already landed on the field.