Nuclear families become more common as . 1 grandparents care for children whose parents are at work

2 people move from farms to cities

3 children grow up, marry, and give birth

4 people’s social class becomes less changeable

I believe its 3 or either 1

Explanation:

hope this helps :)

we can solve this via the kinematic equation:

where the vertical velocity is zero and so:

since the height of the building is 29.3 meters then:

the ball was in motion for approximately 2.45 seconds