Updated: 03/31/2016 - by Philip Reed, Senior Consumer Advice Editor. 1  Inspected by Factory-Trained Technicians Before being put in a manufacturer's certified pre-owned program, technicians inspect the vehicles for a number of factors, including tire tread depth and brake pad thickness. The Benefits of Buying CPO Nearly all manufacturers now have certified pre-owned cars for sale.
The sum of a rational number and an irrational number is irrational.. By definition, an irrational number in decimal form goes on forever without repeating (a non-repeating, non-terminating decimal). By definition, a rational number in decimal form either terminates or repeats. If you add a non-repeating, non-terminating decimal to a terminating decimal, you still have a non-repeating, non-terminating decimal.
Conversely the period of the repeating decimal of a fraction c / d will be (at most) the smallest number n such that 10 â 1 is divisible by d. For example, the fraction 2/7 has d = 7, and the smallest k that makes 10 â 1 divisible by 7 is k = 6, because 999999 = 7 Ã 142857.