Answer:
1944x^2.
Step-by-step explanation:
 sqrt 2x^2 * sqrt18^5
= sqrt2x^2 * (sqrt(9^5*2^5))
= sqrt 2 x^2 * (sqrt9^5 * sqrt 2^5)
= sqrt2 x^2 * (243* sqrt2^5)
= 2^0.5 (243 * 2^2.5) x^2
= 2^3 * 243 x^2
= 1944x^2.
 
        
             
        
        
        
A repeating decimal is when the number repeat or go on forever and do not change 
a terminating decimal is one that has an end to it's numbers 
example of repeating: .303030303030303.....
example of terminating: .2427
        
             
        
        
        
area = pi x r^2
615.75 = 3.14 x r^2
r^2 = 615.75/3.14 =196.0987 round to 196.1
r = sqrt(196.1) = 14.00357 round to 14
radius = 14 kilometers
 
        
             
        
        
        
Answer:0.5
Explanation: 12.5-12=0.5