Which method would specify the time, in minutes and seconds after a hack statement, rounds impact on the target?

The correct choice is Time to Target. This method is specifically utilized to indicate the time it will take for the rounds to hit the target after the completion of a hack statement. The emphasis on "time" is crucial, as it provides a precise measurement that can be expressed in minutes and seconds, detailing when the artillery will impact.

Time to Target is important in fire support planning because it helps coordinate the timing of the strike with other combat operations. By knowing this timing, ground troops can manage their movements and activities effectively around the incoming fire. The clarity provided by this method ensures that all units involved can work in unison and maintain situational awareness during an operation.

The other options do not accurately reflect this specific timing requirement. Time on Target typically refers to a coordinated time when multiple rounds from different artillery units strike the target simultaneously, but it does not provide the incremental timing from the hack statement. Request Time involves the act of submitting a request for fire support and does not pertain to the impact timing of rounds. Duration refers more broadly to the length of time something lasts rather than the specific timing of round impacts.