Answer is: 
                    
            3.0 KW
                    Answer is: 
                    
            4 flipflops
                            Explanation: 
                            
                                        
                                            A decade counter is a type of counter circuit that goes through ten unique states, counting from 0 to 9, and then resets to 0. Each flip-flop represents a binary bit in the count sequence. Since a binary-coded decimal (BCD) representation of 10 requires 4 bits (from 0000 to 1001), a decade counter typically requires 4 flip-flops to cover the entire count range.
