When solving these proportions we just remember when moving a number from one side to the other if it started in the numerator it ends up in the denominator and vice versa.
I'll do it in two steps here for teaching purposes; it's not too hard to go directly to the answer.



⭐Hola User_______________
⭐Here is your Answer. ...!!
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↪Actually welcome to the concept of the Graphs ..
↪Basically the given half graph is a parabolic graph of equation
↪y^2 = 4ax ...
↪thus the 3 graph option is the completion of the graph in the question ..
↪Option d.)
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A should be the correct answer
Answer:
3.4 km = 3.4 * 100,000 cm = 340,000 cm