Step-by-step explanation:
a) 6400
b) 4800
c) 32000
hope this answer helps you dear!
Answer: The answer is 3^12.
Step-by-step explanation:

notice, if the original area was πr², then the new area has a factor in front of it, that much.
The fewest number of expressions is 3.
Answer:
B
Step-by-step explanation: