Your formula here is A=pir^2
Plug in the numbers but instead use 22/7 for pi
A=(22/7)(21)^2
A=22/7*441=1386
Answer is 1386 sq inches
I think the answer is 32x
Answer:
C
Step-by-step explanation:
Answer:

Step-by-step explanation:
13-3 = 10
10/5 = 2
2 x 6 = 12
Answer:
increase in percent
Step-by-step explanation:
it is increase in percent, but the question you're asking is dependend on the context..