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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.

Aright cylinder has a diameter of 8 m and a height of 6m. what is the volume of the cylinder

What is the value of the discrimination for the quadratic equation 0=×2+2+×2