If the range setting is 999M, what time setting is needed for a 3 hour delay?

To determine the correct time setting needed for a 3-hour delay when the range setting is 999M, it is important to understand how time settings translate into the specified range units.

In the context of timing devices, the time settings are often expressed in terms of minutes. For a 3-hour delay, you need to convert hours into minutes, as there are 60 minutes in an hour. Therefore, for a 3-hour delay, you would calculate:

3 hours x 60 minutes/hour = 180 minutes.

Next, the time setting would need to reflect this 180-minute duration. When examining the available choices based on formatting and the maximum time limit set by a range of 999M, none of the provided options (300, 030, or 003) correctly equate to 180 minutes.

The choice "none of these or out of range" is accurate because the correct setting for a 3-hour delay does not appear in the options presented. The correct format for representing 180 minutes would need to be explicitly designated, which is not among the provided selections. Therefore, the conclusion that the necessary time setting is not listed is justifiable, leading to the response indicating that none of the choices fits the requirement.