C represents 100, L is 50, X represents 10, x is 10 and I represents 1. So this would be CLXXXIX.
189 = CLXXXIX
The number 947 in Roman numerals would be CMXLVII
XLIII
298 = CCXCVIII189 = CLXXXIX
In todays notation of Roman numerals: XVIII-VII-MCMLXXXI
3505 can be expressed as 1000 + 1000 + 1000 + 500 + 5. Translate that to Roman Numerals and you get MMMDV.
CDLIV
You would write 28775 in roman numerals. This would translate to (XXVIII)DCCLXXV feet.
XXI-July-MM
X-XXVII-V
IV-XXVI-XI
X-XXVII-LXXIV