Respuesta :

Hey there!

#7 = 8 in. × 10 in. 
#8 = It Doubles.
#9 = 615.75 or 616 rounded. Do 22/7 x 14² = 616 (the diameter is 28, the radius is half the diameter, which is 14.)
#10 = 416 mm. Do V = L x W x H = 5 x 8 x 10.4 = 416

Hope I helped!
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