Answer: 3.2 miles
Step-by-step explanation: Trust me bro. 1000% right
The answer to this question is C.
For this case we have the following quadratic equation:

Where:

By definition, the discriminant of a quadratic equation is given by:

We have to:
Two different real roots
Two different complex roots
Two equal real roots
Substituting the values we have:

So, we have two different complex roots
Answer:
Two different complex roots
Neptune is about four times wider than Earth.