Answer: No, 476 is not a rational number.
Step-by-step explanation: A rational number is defined as any number that can be written as a fraction, where both the numerator (the top number) and the denominator (the bottom number) are integers, and the denominator is not equal to zero. For this problem, since the square root of 476, is 21.817, this is not a rational number. 476 is defined as a whole number, because it is not a fraction/decimal and is not a negative number. It could also be an integer, which means any whole number that is negative or positive.