Given v1 = 5i + 2j and v2 = ai - 6j are perpendicular to each other, determine the value of a.

Given v1 = 5i + 2j and v2 = ai - 6j are perpendicular to each other, determine the value of a.
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Given v1 = 5i + 2j and v2 = ai - 6j are perpendicular to each other, determine the value of a.
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