Answer:
Speed=<u>Distance</u><u> </u>
Time
=<u>60</u>
12
=5m/s
For this case, what we must do is to rewrite these measurements in the same unit in order to compare them.
By writing the measurements in meters we have:
![30 mm = (30) * (\frac{1}{1000}) = 0.030 m](https://tex.z-dn.net/?f=%2030%20mm%20%3D%20%2830%29%20%2A%20%28%5Cfrac%7B1%7D%7B1000%7D%29%20%3D%200.030%20m%20%20%20)
![30 cm = (30) * (\frac{1}{100}) = 0.30 m](https://tex.z-dn.net/?f=%2030%20cm%20%3D%20%2830%29%20%2A%20%28%5Cfrac%7B1%7D%7B100%7D%29%20%3D%200.30%20m%20%20%20)
![30 dm = (30) * (\frac{1}{10}) = 3 m\\30 Hm = (30) * (100) = 3000 m](https://tex.z-dn.net/?f=%2030%20dm%20%3D%20%2830%29%20%2A%20%28%5Cfrac%7B1%7D%7B10%7D%29%20%3D%203%20m%5C%5C30%20Hm%20%3D%20%2830%29%20%2A%20%28100%29%20%3D%203000%20m%20%20%20)
Therefore, physically the correct measure is:
![0.30 m = 30 cm](https://tex.z-dn.net/?f=%200.30%20m%20%3D%2030%20cm%20%20)
Answer:
the length of a student's textbook most likely is:
30 centimeters
Insomnia is a condition in which the person with it has difficulty sleeping