The Pacific Northwest (PNW), sometimes referred to as Cascadia, is a geographic region in western North America bounded by the Pacific Ocean to the west and (loosely) by the Cascade Mountain Range on the east.
Mean time between failures (MTBF) describes the expected time between two failures for a repairable system, while mean time to failure (MTTF) denotes the expected time to failure for a non-repairable system. the MTBF is the sum of the operational periods divided by the number of observed failures.
Formula. TC (total cost) = TFC (total fixed cost) + TVC (total variable cost). Now that you know the formula and things to consider, let's go back to that question in the beginning of how much it costs to operate your car every month.he formula to calculate total cost is the following: TC (total cost) = TFC (total fixed cost) + TVC (total variable cost). To unlock this lesson you must be a Study.com Member.