8. What is a result when you convert 2's complement binary number 101011 to decimal number? )-21 2-20 -21-20 2) +20 3)-21 4)-20 9. What is a result when you convert BCD code 1001001 to decimal number? 1) 48 2) 49 3) 91 4) 90 10. What is a result when you convert Gray code 101011 to decimal number? 1) 50 2)-18 3) 52 4) 43 11. What is a result when you convert a decimal number -15 using 2's complement 7-bit binary representation? 1) 1110001 2) 1001000 3) 0001111 4) 1110000 12. What is a result when you convert a decimal number -27 using 2's complement 7-bit binary representation? 1 1011000 2) 1100110 3) 1100101 4) 1100100 13. What is a result when you convert a hexadecimal number 3F to decimal number? ) 18 2) 63 3) 21 4) 41 14. What is a result when you convert a (regular) binary number 010100011011 to hexadecimal number? 1) 51B 2) 41B 3) 51C 4) 41C 15. What is a result when you convert a hexadecimal number 3CB8 to (regular) binary number? 1) 0101 1000 1011 0011 2) 1001 1110 1100 1100 3) 0011 1100 1011 1000 4) 0010 1101 1101 1001