Answer:
6 srry if dis is wrong sis 
Step-by-step explanation:
since the radius is 12 divide that by 2 and you get 6 which is the diameter. 
so im guessing the answer is 6 idk i haven't done this inna min. i hope this was helpful <3 
 
        
                    
             
        
        
        
Not it doesn’t form a right angle because if you add it all together it makes it 54
        
                    
             
        
        
        
Answer:
   C.  Three
Step-by-step explanation:
We want to solve the equation for n:
   14,580 = 20,000(9/10)^n
   14580/20000 = 729/1000 = (9/10)^n
   (9/10)^3 = (9/10)^n . . . . . . write the left side as a cube
   3 = n . . . . . . equate exponents
After year 3, the value will be $14,580.
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You can use logarithms to find n:
   log(0.729) = n×log(0.9) . . . . . . taking the log of the 2nd line above
   log(0.729)/log(0.9) = n = 3
 
        
             
        
        
        
Answer: 180 degrees
Step-by-step explanation:
The measure of the arc of a semicircle is 180 degrees.
 
        
             
        
        
        
426,000 * 10^-4. You can go use a standard form calculator. and if you don't have a physical one, you can use one online.