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Step-by-step explanation:
7)c) eight times
No reason just get it cubed
2*2*2=8
8)a)2/5
Because probability is number of favourable outcomes upon total number of possible outcomes
Favourable- 8
Total-20
Divide in shortest form
2/5
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In 7 question instead of ratio it is radius
It becomes 8 times , substitute 2r (doubled radius) in the formula of finding volume of sphere
In 8 question,it is 2/5
Hope it helps
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