Which expression is equivalent to 64a6b7c9? BRES
o 2abc4a2b8c
o 4a²b2c (PVD
o Baºb°c (be)
8a%bc%(1/6)
Foid(0);

The domain of the following relation: r: {(3, 5), (8, 6), (2, 1), (8, 6)} is (1 point) no domain exists {1, 5, 6} {3, 8, 2, 8} {2, 3, 8}