She would have had to buy 8 key chains for three dollars a piece.
        
                    
             
        
        
        
Biggest is all nine's
smallest is 1 then zeroes
greatest
999999
smallest
10000
        
             
        
        
        
3*2 = 6 ;
4^2 = 16;
/-2/ = +2;
16*2 = 32 ;
5 + 6 - 32 = 11 - 32 = -21;
The right answer is D) -21 ;
        
             
        
        
        
F = kq2 / r2  
q = ne 
 F = k(ne)2 / r2 
 n = âš(r2F / ke2) = (r/e) âš(F/k) 
 k = 9 x 109 Nm2/C2 
 e = 1.6 x 10-19 C 
 n = [(4.2 x 10-10) / (1.6 x 10-19)] âš[(5.2 x 10-9) / (9 x 109)] ≅ 1.995 ≅ 2
        
             
        
        
        
So,
Since this is independent probability, the probability of the event above occurring is:

First, the probability of landing on heads.

Now, the probability of rolling an even number.
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Plug it into the equation.

The correct option is C.