10°c
Explanation:
Given parameter; 
 Lower fixed point = 30mm
Upper fixed point = 180mm 
Reading = 45mm
Unknown: 
The degree celcuis temperature at 45mm = ? 
Solution: 
To solve this problem we simply compare the mm- scale to the celcius - scale that we know. 
The upper fixed point is the boiling point of water
 Lower fixed point is the freezing point of water
 This shows that both the upper and lower fixed point of both thermometers are the same; 
          mm-scale          °c scale
           180mm               100°c
 
             45mm                x 
           30mm                  0°c
 Solving; 
                      
    x (150) = 100  x 15 
    x = 10°c
learn more: 
Temperature scales brainly.com/question/1603430
#learnwithBrainly
  
 
        
             
        
        
        
Answer:
D. 2.5 m
Explanation:
1.5 m up to the beam + 0.5 m up + 0.5 m down = 2.5 m total
 
        
             
        
        
        
Answer: C
Both Technicians A and B
Explanation:
Only a DOT-approved flasher unit should be used for turn signals. And a parallel (variable-load) flasher will function for turn signal usage, although it will not warn the driver if a bulb burns out.