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Ok so you have to divide the diameter by 2 which is 1.4. Now we mutiply 3.14*1.4*2*9=79.128 2*3.14*1.4*1.4=3.5168 79.128+3.5168=82.6448 We can reduce this to get 82.6. What I did was just to see if the 4 was higher than five and it wasn't so we just have
