Making good choices about retirement involves the processing of numbers. In particular, consumers must have easily available, accurate, and timely numbers, and they must also use them. Contrary to the consumer-driven approach, however, the evidence demonstrates that having an abundance of information does not always translate into it being used to inform choices. The challenge is not merely to ...

Mathematicians have been fascinated for centuries by the properties and patterns of numbers. They noticed that some numbers are equal to sum all their factors (not including number itself). Such called perfect Thus a positive integer is if it its proper divisors. The search began in ancient times. four 6, 28, 496, 8128 seem known from In this paper, we will investigate important We give easy si...

the compressibility factor of nonassociated chain molecules composed of hard convex core yukawa segments was derived with saft-vr and an extension of the barker-henderson perturbation theory for convex bodies. the temperature-dependent chain and dispersion compressibility factors were derived using the yukawa potential. the effects of temperature, packing fraction, and segment number on the com...