Which ratio is equivalent to 7:3 21:7

28:12

49:9

12:8

With this one. will mark brainliest

What is the multiple zero and multiplicity of f(x) = (x ? 3)(x ? 3)(x + 5)? multiple zero is 3; multiplicity is 2 multiple zero is 5; multiplicity is 1 multiple zero is ? 5; multiplicity is 1 multiple zero is ? 3; multiplicity is 2

What is the range? can’t seem to find it out