Can anyone help me find this missing length

18

Step-by-step explanation:

I would say 18 because the triangles are similar. 20x1.5 is 30. So if you multiply 12x1.5, you get 18.

Hope it helps!

fahrenheit

step-by-step explanation:

fahrenheit is more precise than celsius. the ambient temperature on most of the inhabited world ranges from -20 degrees fahrenheit to 110 degrees fahrenheit—a 130-degree range. on the celsius scale, that range is from -28.8 degrees to 43.3 degrees—a 72.1-degree range. this means that you can get a more exact measurement of the air temperature using fahrenheit because it uses almost twice the scale.