Question

7 30.9 in. = mm

Explanation:

Step1: Recall the conversion factor

We know that 1 inch ($in.$) is equal to 25.4 millimeters ($mm$), so the conversion formula is $length\ in\ mm = length\ in\ in. \times 25.4$.

Step2: Substitute the given value

Given the length in inches is 30.9, we substitute into the formula: $30.9\times25.4$.

Step3: Calculate the product

First, calculate $30\times25.4 = 762$, then calculate $0.9\times25.4 = 22.86$. Then add them together: $762 + 22.86 = 784.86$.

Answer:

784.86