Answer:
There's no specific answer
Step-by-step explanation:
If you want the Midpoint M between A and B then you should use the equation 
Solution:
The standard equation of a hyperbola is expressed as

Given that the hyperbola has its foci at (0,-15) and (0, 15), this implies that the hyperbola is parallel to the y-axis.
Thus, the equation will be expressed in the form:

The asymptote of n hyperbola is expressed as

Given that the asymptotes are

This implies that

To evaluate the value of h and k,
1/4 of 20 is 5.. and 5/10, 3/6, 2/4, 6/12 are all equal to 1/2