So the zeros come in positive and negative pairs. If there are an odd number of intercepts like there are here, it's because one of them is x=0 which is its own negation.
Given zero x=6 we know x=-6 is also a zero.
So we know three zeros, and know the other two zeros are a positive and negative pair.
Explanation: We know that: small diameter = 2 * 10^-2 in large diameter = 6 * 10^-2 in
We want to know how many times larger is the thin diameter compared to the large one. We will do this as follows: large diameter = k * small diameter where k is the number of times that we want to find 6 * 10^-2 = k * 2 * 10^-2 k = (6 * 10^-2) / (2 * 10^-2) k = 3
This means that the large diameter is 3 times the small one.
