Elsa is correct; 2.141441444... is not a rational number.
A rational number can be expressed as a fraction, where the numerator and denominator are both integers. However, the number 2.141441444... cannot be written in this form. It is a recurring decimal or a non-terminating decimal, meaning it goes on forever without repeating the pattern of digits.
The likely cause of Richie's error is confusion between rational and irrational numbers. Irrational numbers cannot be expressed as fractions and include numbers like π (pi) and √2 (square root of 2).
Richie says that 2.141441444... is a rational number. Elsa disagrees. Who is correct? What is the likely cause of the error?
3 answers
Is -9 rational
Yes, -9 is a rational number. A rational number is any number that can be expressed as a fraction, where the numerator and denominator are both integers. In this case, -9 can be expressed as -9/1, where -9 is the numerator and 1 is the denominator.