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Two properties of minerals that can be expressed in numbers are hardness and specific gravity. Hardness is usually determined using the Mohs scale and is expressed as a number between 1 (softest) and 10 (hardest). Specific gravity is the ratio of a mineral's density compared to the density of water and is expressed as a number.
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What are numbers that can be expressed as a fraction?
Numbers that can be expressed as fractions consisting of two integers are rational numbers. sqrt(2)/3 or pi/4 are fractions but they are not rational.
A number that can be expressed as a ratio of 2 integers?
Rational numbers.
Can every prime number be expressed as the product of 2 prime numbers?
No, none can.
What is the role of rational and irrational number plays in modern day calculation?
Rational numbers can be expressed as fractions whereas irrational numbers can't be expressed as fractions such as the square root of 2
Is the difference of any 2 rational numbers a rational number?
Yes it is. Rational numbers are numbers that can be written as a fraction. Irrational numbers cannot be expressed as a fraction.
