Jeannie knows that if she multiplies the current of the circuit by its resistance, she can find the voltage. The circuit right now has a resistance of 4i ohms and a current of 12-7i amps. What is the voltage of the circuit?

Scores on the cognitive scale of the bayley-scales of infant and toddler development range from 1 to 19, with a standard deviation of 3. calculate the margin of error in estimating the true mean cognitive scale score, with 99% confidence, if there are 12 infants and toddlers in a sample.