Using the six-tenths rule, if the cost of a unit at a certain capacity is known, what is the approximate cost of a similar unit with n times the original capacity expressed as a multiple of the initial cost?

Explanation

According to the six-tenths rule, the cost of a unit scales with its capacity raised to the 0.6 power. Therefore, if the capacity increases by a factor of n, the cost is approximately n^0.6 times the original cost. However, in this question, option A (n) is marked as correct, meaning the cost increases linearly with capacity.