A hyperbola has its foci at (1,7) and (1,-13). a directrix of the hyperbola is y=64/10. what is the equation of the hyperbola?

answer

d. 10

explanation

the distance from point y to wx is the height of the triangle.

using pythagoras theorem,

group similar terms to get,

this implies that,

take positive square root of both sides to get,

this implies that,

it would take 7/10 of an hour too fill the pool.

step-by-step explanation:

the first option is the answer.