Answer :

Final answer:

The number -1.57 belongs to the subsets of rational numbers and real numbers since it is a decimal that can be expressed as a ratio of integers and does not have an imaginary component.

Explanation:

The number -1.57 is a member of various subsets of all real numbers. Since it is a decimal, it is not an integer, which are whole numbers, but it is a rational number because it can be expressed as a ratio of two integers (in this case, -157/100). Furthermore, it belongs to the set of real numbers which includes all rational numbers as well as irrational numbers like π and √2. However, it is not a complex number because it does not have an imaginary component. Hence, the subsets of real numbers to which -1.57 belongs are rational numbers and real numbers.

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Rewritten by : Barada