All the matter, mass, and time that exists and has ever existed is contained in which of the following?

the sun
the planets
the universe
the milky way

The correct answer is C. The universe

Explanation:

In physics, the universe is the one that contains all we know including stars, planets, and galaxies and because of this, it is said the universe contains all matter, space, mass and time as it is in the universe all events and things exist, have existed and will exist. Additionally, the universe's size is unknown and there is only an estimated observable size, in the same way, the time the universe has existed and all the events that have occurred in them have not been determined precisely. Considering this, the one that contains all matter, mass and time is the universe.

the total distance that martina travels that day is

(distance from home to mom's office) plus (distance from mom's office to school)

plus (distance from school to library) plus (distance from library to friend's house)

plus (distance from friend's house to martina's house).

(we don't know what any of these distance actually is.)