The hiker followed the north trail a distance of two kilometers in thirty minutes is an example that provides a complete scientific description of an object in motion.
Answer:
C
Explanation:
The United States has a mixed economy it works according to economic system that features characteristics in both capitalism and socialism it makes economy system protects some private properties and allows a level of economic freedom in the use of capital
That would be the Main Asteroid Belt
The frequency f of a wave is defined as the inverse of the period T:

The clock in the problem has a waveform with period

. Therefore, its frequency is