*Question T5B13:
Which is equal to 2425 MHz?*  

*Correct Answer is  C: 2.425 GHz*  

### AI Response: (may contain errors)  

To convert megahertz (MHz) to gigahertz (GHz), you can use the following relationship:

$$
1 \text{ GHz} = 1000 \text{ MHz}
$$

Now, let's analyze the question:

### Correct Answer: C: 2.425 GHz

To convert 2425 MHz to GHz, you divide by 1000:

$$
\text{Frequency in GHz} = \frac{2425 \text{ MHz}}{1000} = 2.425 \text{ GHz}
$$

This shows that 2425 MHz is indeed equal to 2.425 GHz.

### Why the Other Choices are Incorrect:

- **A: 0.002425 GHz**  
  This is incorrect because it represents a much smaller value. If you convert 0.002425 GHz back to MHz, you would multiply by 1000, resulting in 2.425 MHz, which is not the same as 2425 MHz.

- **B: 24.25 GHz**  
  This is incorrect because it is 10 times larger than the correct value. If you convert 24.25 GHz to MHz, you would multiply by 1000, resulting in 24250 MHz, which is also not equal to 2425 MHz.

- **D: 2425 GHz**  
  This is incorrect because it is 1000 times larger than the correct value. Converting 2425 GHz to MHz would give you 2425000 MHz, which is far greater than 2425 MHz.

### Summary

- The correct conversion from MHz to GHz is done by dividing by 1000.
- The only correct answer is C: 2.425 GHz, as it accurately reflects the conversion of 2425 MHz.