Answer:
I believe it's the last one.
Answer:
Probly the enviormently agency
Step-by-step explanation:
HOPE THIS HELPS GIVE BRAINLIEST!!!!!!
I cant directly give u the answer but here is some help:
for part a add up and solve the equazions on the whiteboard.
for part b subtract 90 from what you got from part a.
Hope this helps. Sorry i couldnt help more.
ANSWER

EXPLANATION
The given radical is

Remove the perfect square from the second radical.




Subtract the like radicals

The formula is pi times the radius squared (A = π r²).
So it might be 78.53