Answer: Commutative property of addition
The diameter of under the magnifying glasses is 6cm, so the actual size is 6÷5cm, the diameter is 1.2 cm
B) 6, 8, 10
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What grade are you in cause like
(10×10)+(10×5)=10z
100+50=10z
150=10z
z=15 which is C. Hope it help!