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What early group was the first to use rational thought or logic while investigating the physical world?
The greeks
Can you ever use a calculator to determine if a number is rational or irrational?
The answer to your question begins with a question to you. How do you know what number you are interested in ? How is it specified ? If the number is written down as a decimal, it must have a finite number of digits. This would make it a rational number. If it is written down as a fraction, that also is rational. If the number is specified as a procedure, that may or may not be rational. You make the determination using your head for logical thought - something calculators can't do. So, the short answer to your question is : no, except for a few very special cases, most of which are susceptible to logical analysis anyway.
What is a system of symbols that can be combined in an infinite number of ways and can represent not only objects but also abstract thought?
A written language.
How do you identify absolute value of rational numbers?
The absolute value of a number may be thought of as its distance from zero. In mathematics, the absolute value of a real number x is the non-negative value of x without regard to its sign.
How are rational numbers used in your daily lives?
Well I have been thinking about it and I thought it might be...=well it might be when you go shopping i guess...well I mean...DON'T LOOK AT ME LIKE THAT!! I'm under enough pressure as it is...well i gues you have to look on google...sorry I coun't be much help...come back tomorrow and we will have a milkshake! BYE!=
