Ariel Claims That a Pulse Is Described by the Equation

Ariel claims that a pulse is described by the equation where x and y are measured in cm and t in s. Miranda says that it is not possible to represent a pulse with this function because a wave must be a function of x + vt or x − vt. Which one, if either, is correct, and why?

A) Ariel, because x² - 6.0xt + 9t² = (x - 3.0t) ².
B) Ariel, because a pulse is not an infinite wave.
C) Miranda, because (x - 3.0t) ² is the same as (3.0t - x) ².
D) Miranda, because a pulse is not an infinite wave.
E) Miranda, because
is infinite when x = 0.

Correct Answer:

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