Answer:
   61
Step-by-step explanation:
Put 12 where n is, then do the arithmetic.
   a(12) = -5 +6(12-1) = 61
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We assume you didn't really mean to show an equation for -a(n). If you did, then the term you want is -61.
 
        
             
        
        
        
Answer:
The quotient of 4 and 9 raised to the power of r.
Step-by-step explanation:
 
        
             
        
        
        
Answer:
B
Step-by-step explanation:
I Had this 
 
        
             
        
        
        
Answer:
   9990 years
Step-by-step explanation:
The exponential function with given values filled in can be solved for the unknown using logarithms.
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   Q(t) = 12 = 36e^(-0.00011t)
   1/3 = e^(-0.00011t) . . . . . . divide by 36
   ln(1/3) = -0.00011t . . . . . . take natural logs
   t = ln(1/3)/(-0.00011) . . . . divide by the coefficient of t
   t ≈ 9990 . . . years
 
        
             
        
        
        
Answer:
157.5
Step-by-step explanation:
Try like this:
45 times 3.5