Assume that x is a char variable has been declared and already given a value. Write an expression whose value is true if and only if x is an octal (Base 8) digit (0-7).

An atom's diameter is about 0.1 nanometer (1×10-9m), and a human hair is about 1×10-3m. how many times greater is a human hair than an atom's diameter? sorry pushed wronf button but this is math

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Healthy study habits are best described as