Please help me answer this question

Let, the total no. of sevings be "s"
According to the question,
0.1 L of honey makes 1 serving 
1 L of honey makes 1/0.1
0.8 L of honey makes (1/0.1)*0.8
So, you use the abouve equation to find the answer
answer choice B and answer choice A are the correct one

One root of a third degree polynomial function f(x) is -5 + 2i

The statement that describes the number and nature of all roots for this function is:
f(x) has two complex roots and one real root. 

Two complex roots because whenever a complex number is a root of a polynomial with real coefficients, its complex conjugate is also a root of that polynomial. They come in pairs.