Which model would represent Newton's law of action-reaction? * A) Toy car rolling down a ramp.
B) Toy rocket being launched.
C) Toy boat floating in the water.
D) Toy tractor being pushed over a hill.

D
I’m not 100% sure but you have to use force/motion to put it into action and it’s reacting to being pushed by moving

B or A I’m not sure but I know it’s one of those. Newton discovered gravity and those are the only two that are related to gravity.

the catch is that the top numbers are atomic masses the bottom numbers are the numbers of protons and electrons in an uncharged atom. they are the number of that atoms as you would find them on the periodic table. further, the numbers on the left are used to determine the missing numbers on the right

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer