It's 8/a^6 that's your answer
Answer:

Step-by-step explanation:
Area = pi*r^2
Area = pi*9^2
Area = 
Answer:
3^-5 or 1/3^5(b)
Step-by-step explanation:
3⁴•3^-9
When bases are same powers are to be added
So the above expression becomes
3^4+(-9)
3^4-9
3^-5