How is 10 Megahertz represented in standard units?

The correct representation of 10 Megahertz in standard units is indeed expressed as 10 x 10^6 Hz. Megahertz (MHz) is a unit of frequency where 1 MHz equals 1 million hertz or 1 x 10^6 Hz. Therefore, when you convert 10 MHz to hertz, you multiply 10 by 1 million:

10 MHz = 10 x 1,000,000 Hz = 10 x 10^6 Hz.

This demonstrates that in scientific notation, 10 Megahertz is more accurately represented as 10 x 10^6 Hz rather than just a different form like 1 x 10^6 Hz or 0.1 MHz, which do not represent the correct conversion.