Final answer:
To solve for the variable A in equation A divided by 4 equals 18, the correct operation is multiplication by 4, leading to a = 18 * 4.
Step-by-step explanation:
To solve the equation A divided by 4 equals 18, we need to perform an operation that will isolate the variable A on one side of the equation. This can be done by executing the inverse operation of division, which is multiplication. Therefore, we need to multiply both sides of the equation by 4 to get A on its own. The correct operation to solve for A is represented by option A, which states a = 18 * 4.