The formula for this is

. If the diameter is 8 the radius is 4, so filling in accordingly we have

and

which is

and when you multiply in 3.14 you get that A = 401.92 or B above.
Answer:
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Step-by-step explanation:
8 cm the answer is hope it helps good luck
Answer: 14.5
Step-by-step explanation: there is 1000 g in a kg