Answer:6Step-by-step explanation:The geometric mean is a type of average, used when you're dealing with multiplication or ratios. It’s especially useful when comparing things like growth rates, proportions, or values that increase by multiplication.For two numbers, the geometric mean is simply the square root of their product.We are asked to find the geometric mean between 3 and 12.Step 1: Multiply the two numbersThis step finds the product of the two numbers.Step 2: Take the square root of the product