Respuesta :

Answer:

about 4.5

Explanation:

A=pir^2

64=3.1415(r)^2

20.3=r^2

4.5=r

miasimonawitz

Answer: r= 4 ft

explain: Plug in the 64 ft to the ration of R= area over pi and then you get your answer of 4ft

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good job