Table:
text: United States Senate elections, 2010
Senate composition at the beginning of the
Senate composition at the beginning of the
D_39_ D_40_ D_41_ D_42_ D_43_ D_44_ D_45_ D_46_ D_47_ D_48_
R 20 R 19 R 18 R 17 R 16 R 15 R 14 R 13 R 12 R 11
R 1 R 2 R 3 R 4 R 5 R 6 R 7 R 8 R 9 R 10

Question: What is D 42 √ if D 43 √ r 5 in the 2010 US Senate election?