Answer:
<u>1</u><u>)</u><u>Amplitude</u>
<u>2</u><u>)</u><u>Modulation</u>
<u>3</u><u>)</u><u>Frequency</u><u> </u>
<u>4</u><u>)</u><u>Modulation</u>
<span> are a base 10 system, but they're not a </span>place-value<span> system. Until the Indo-Arabic system became the standard written way to denote numbers, most of the </span>numeral<span> systems of the world were some sort of base 10 system, but not a</span>place-value<span> system.</span>
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Hammurabi is most remembered for writing the Code of Hammurabi.
Where are the sentences ?