A 2.29
B 2.75
C 4.25
D 4.5
Correct Answer: Option D
Let (17)3.5 x (17)x = 178.
Then, (17)3.5 + x = 178.
So, 3.5 + x = 8
=> x = (8 - 3.5)
=> x = 4.5
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