P6 - Declared brain-dead patient whose organs are being removed for donor purposes
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The letter on the left indicates the month it was made (for instance A=January and B=February). The roman numeral or number on the right indicates the year it was made.
The issuing bank identifying letter and number is printed on the obverse of all US $1 banknotes. A1 indicates that the note was issued by the Boston Federal Reserve Bank.
A mixed number, like 3 and 1/2, is a combination of a whole number and a fraction and indicates a number that lies between consecutive whole numbers. Whole numbers are integers, counting numbers like 1, 2, 3 etc.
An exponent
No, 60 is not equal to -60. In mathematics, the sign of a number indicates its direction on the number line. The positive sign (+) indicates a number is greater than zero, while the negative sign (-) indicates a number is less than zero. Therefore, 60 and -60 have the same absolute value (60), but they are in opposite directions on the number line.