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Elapsed Time in Distance, Rate, and Time Problems
In the distance formula , the variable represents the elapsed time — the actual duration of travel measured in hours, minutes, or other time units. Elapsed time is the amount of time that passes between the start and end of a trip, not a reading from a clock. When a problem provides starting and ending times as clock readings (for example, "left at 2:00 p.m. and arrived at 5:00 p.m."), the elapsed time must first be calculated by finding the difference between the two clock times before the formula can be applied. For the example above, the elapsed time would be hours, and would be substituted into . Failing to convert clock times into elapsed time before using the formula is a common source of error.
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A logistics coordinator is auditing vehicle trip logs to calculate total distances using the formula . If a log entry shows a departure time of 2:00 p.m. and an arrival time of 5:00 p.m., which of the following describes a common error to avoid when identifying the value for ?
A logistics coordinator is reviewing a trip log that shows a vehicle departed at 2:00 p.m. and arrived at 5:00 p.m. According to the formula , which of the following is the correct procedure to identify the value of ?