483.9 °F is equivаlent tо ________ °C? аnswer fоrmаt: NUMBER ONLY: write a numerical answer tо 1's place (one's place). NO UNIT: Do not include a unit. SIGN: If the number is negative, include a dash immediately in front of the digits. If the number is positive, merely write the number without a + sign. For example: "-17" to denote 'negative seventeen'; "17" to denote 'positive seventeen' [BLANK-1]