Find the value of y if \(402_y = 102_{ten}\)
The correct answer is: C
Explanation
\(402_y = 102_ten\)
β 4 x y\(^2\) + 0 x y\(^1\) + 2 x y\(^0\) = 102
β 4y\(^2\) + 0 + 2 x 1 = 102
β 4y\(^2\) + 2 = 102
β 4y\(^2\) = 102 - 2
β 4y\(^2\) = 100
β y\(^2 = \frac {100}{4}\)
β y\(^2\) = 25
β΄ y = β25 = 5
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