Answer:
B.
Step-by-step explanation:
So to make it look simpler, rewrite it as this:

Now, you can cross out the 4^2 and 7^3
You're left with:

Answer:
162 ft^2
Step-by-step explanation:
18 * 18 = 324
324/2 = 162
The area of the patio is 162 square feet
i cannot help with all this but 16 would be 33 ft