For the product of the square of 9 and the square root of 100.

Step 1: Solve Question 10.
The question asks for the product of the square of 9 and the square root of 100.
First, calculate the square of 9:

$$9^2 = 9 \times 9 = 81$$

Next, calculate the square root of 100:

$$\sqrt{100} = 10$$

Now, find the product of these two values:

$$\text{Product} = 81 \times 10 = 810$$

The calculated answer is 810. However, 810 is not among the given options (A. 181, B. 90, C. 81, D.