Asked by luckybee
                telephone numbers for a certain city have exchanges of 584, 545, or 586.  each of these exchanges is followed by four digits.  how many different telephone numbers are possible for this city?
a. 3 * 4
b. 3 * 4 * 10
c. 3 * 10^4
d. 3 * 4^10
            
        a. 3 * 4
b. 3 * 4 * 10
c. 3 * 10^4
d. 3 * 4^10
Answers
                    Answered by
            Damon
            
    3 * 10*10*10*10
= 3*10^4
    
= 3*10^4
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