Answer:
c) three
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Step-by-step: 
The tetrahedron is a triangular pyramid with equilateral triangles on each face.
 
        
                    
             
        
        
        
Answer:
{t|60 <= t <= 85}
Step-by-step explanation:
The temperatures were measures at different times, but does not stop the values being real numbers (i.e. not discrete, or integer values).
So the range of the function is the set of all values between the minimum and maximum measured during the measuring interval (domain) of hours two and twenty-two.
The minimum value = 60F
The maximum value = 85F
So the interval of the range is [60,85], in interval notation.
In set-builder notation, it is 
{t|60 <= t <= 85}
 
        
             
        
        
        
Just remember it's along the corridor and up the stairs so horizontal comes first
        
             
        
        
        
Answer:
Step-by-step explanation:
area = 30x + 30(x+3) + 30(2x) 
= 30x + 30x+90 + 60x
= (120x + 90) m²
length of planting area = x + (x+3) + 2x = 4x+3 m
area = 30(4x+3) = (120x + 90) m²
x = 5
maple area = 30(5+3) = 240 m²
locust area = 30(2·5) = = 300 m² 
 
        
             
        
        
        
Answer:
Hence the value of damping coefficient = 1.49071.
Step-by-step explanation: