Answer:

Step-by-step explanation:
We can prove that a tangent will always be perpendicular to the radius touching it. So, the other angle in the diagram is  .
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Because all the angles of a triangle sum to  , we have that
, we have that  .
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We combine like terms on the left side to get  .
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We subtract  on both sides to get
 on both sides to get  .
.
So,  and we're done!
 and we're done!
 
        
             
        
        
        
Answer:
a = 9, b = 3, c = 0
Step-by-step explanation:
f(x) = (1/3)^x
a = f(-2) = (1/3)^-2= 9
b = f(-1) = (1/3)^-1 = 3
c = f(0) = (1/3)^0 = 1
whenever something is to the power of 0, the answer will always be 1
 
        
             
        
        
        
15 is your percentage to the answer