41.   Many times, those courageous decisions that stretch the rules brings a hopeless person back to useful life.

42.   More money buys more flexibility and the promise of longer useful life.

43.   Much of it, though, will reach the end of its useful life in the next few years, and would cost billions of dollars to replace.

44.   Now, companies are required to depreciate the value of their real estate over their estimated useful life.

45.   Other medical authorities believe blood substitutes have potential, but say the limited useful life, or half-life, of the current generation will keep them from mainstream use.

46.   Shernicoff said that a property is depreciable when it has a finite useful life and generates income.

47.   Some of the work we do is likely to add months and even years to the useful life of your computer.

48.   So it is a great time to replace old appliances if their useful lives are nearing their end.

49.   The battery, Toyota says, will likely last the useful life of the car.

50.   The Essex in particular was an older ship, nearing the end of its useful life.