4. Martín utiliza 4 horas diarias para el estudio autónomo, 7/10 de este tiempo lo usa la hacer tareas. Y el tiempo restante lo usa para leer los contenidos de las unidades ¿Cuánto tiempo de estas 4 horas le queda libre?

the furthest the dog can be is 508 meters away from the house, and the closest he can be is 492 meters away from the house.

let's first notice, the center of the hyperbola is at the origin, since the focus points are equidistantly 3 units away from the origin, that also means that the distance "c" from the center to either focus is 3.

it should also be notable that, the traverse axis for this hyperbola is vertical, or namely over the y-axis and therefore, the positive fraction will be the one with y-variable.

the traverse "a" component or distance from the center to either vertex is not 2, is more than 2, so we can safely put it at √5 ≈ 2.24.