When x^2 is rounded to nearest decimal, is it equal to 9?
1) When x^3 is rounded to nearest decimal, it is equal to 27
2) when x is rounded to nearest decimal, it is equal to 3
asked 8.5<x^2<9.5 ?
1. 26.5 < x^3 < 27.5 => this is only possible when x is very very close to 3. So x^2 will be definitely very very close to 9. So this is possible
2. 2.5 < x < 3.5 => 6.25 < x^2 < 9.x => clearly cant say
1 is sufficeint
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