Answer: Let's solve the expression step by step:
√9 = 3 (The square root of 9 is 3).
(8-4)² = 4² = 16 (First, we perform the subtraction inside the parentheses, which gives us 8 - 4 = 4. Then, we square 4 to get 16).
Now, we can rewrite the expression:
21 * 3 + 16
Next, perform the multiplication and addition:
21 * 3 = 63
63 + 16 = 79
So, the value of the expression is 79.
Now, let's check which option (A, B, C, or D) matches the value of the expression.
A) 7
B) 8
C) 5
D) 6
The value we calculated (79) does not match any of the given options. It's possible there might be a mistake in the expression or the given options. Please check the expression and options again to ensure they are correct. If you have any other questions or need further assistance, feel free to ask!