Dnesity

The density function of probability. 100% area under the curve as always. 1.0 (ie)?

The lifetime of the machine is distributed continuously. Over time (0,40) with a function dnesity probability f that f (x) = so – and – so . The area under f (x) equal to or not.

Yes, as part of the definition. You can interpret this as a fact that seems to be that if any Will occur is 1 is Prob (space of events). = 1 (which makes sense, right?).