What is the volume of this cube 2.1cm

Tracy solved the following problem. which of the statements is true? 9 ÷ 3 + 6 × 2 3 + 6 × 2 9 × 2 18 her answer is correct. her answer is incorrect. she should have multiplied before dividing. her answer is incorrect. she should have multiplied before adding. her answer is incorrect. she should have added before dividing.

What is the result of the following division?

For f(x) = 3x+1 and g(x) = x2 - 6, find (g/f)(x)