Answer:
[tex]B(4) > A(4)[/tex]
[tex]t = 6[/tex]
Step-by-step explanation:
Given
[tex]City\ A \to Purple[/tex]
[tex]City\ B \to Blue[/tex]
See attachment for both functions
Solving (a): Which is greater in A(4) and B(4).
From the readings of the graph
[tex]A(4)= 1.8[/tex]
[tex]B(4) = 2.6[/tex]
By comparison:
[tex]B(4) > A(4)[/tex] because [tex]2.6 > 1.8[/tex]
Solving (b): When is A(t) = B(t)
From the readings of the graph
[tex]A(t) = B(t)[/tex] when [tex]t = 6[/tex]
i.e.
[tex]A(t) = B(t) = 3\ million[/tex]
