Why do the narrator and his family refer to his dad's childhood home as "the Middle of Nowhere'?

It is a remote place.

Explanation:

Although there is no precise reference to the text, "the middle of nowhere" is a phrase representing a very remote and usually isolated place. So, the narrator and his family must think that his dad's home is far away from them and possibly far away from civilization, hence they call it "the Middle of Nowhere".

an old person

explanation:

either a donut or a sphere or a pancake or a flat sphere. it depends on where the vertical line is.

if the line goes through the center of the circle and is perpendicular to a diameter containing the center, then you get a flat circle.

if the line and the diameter of a the circle meet in the center of the diameter and at an angle, you get a pancake.

if the line is on the circumference of the circle and is at right angles   to the circle you get a ring.

if the line contains the diameter, you get a sphere.

the the line is parallel to the diameter and touches the circumference, you get a donut.