How is "25 million cycles per second" expressed in megahertz?

The expression "25 million cycles per second" can be converted into megahertz (MHz) by understanding the relationship between cycles, hertz, and megahertz.

1 megahertz is defined as 1 million cycles per second. Therefore, to convert cycles per second (hertz) into megahertz, you can divide the number of cycles per second by 1 million.

In this case:

25 million cycles per second ÷ 1 million = 25 megahertz.

This calculation demonstrates that "25 million cycles per second" directly corresponds to 25 megahertz, confirming that this is indeed the correct answer. The other conversion choices involve either significantly lower or higher frequencies than what corresponds to "25 million cycles per second," which would not correctly represent the relationship defined by the units of measurement.