Whuch of the following expressions represent the distance between -3.9 and -4.7? |-4.7 - 3.9| or -3.9 - |4.7|

4. find the geometric mean of 4 and 12. 24 8

What is the equation of a line passing through the point (6,1) and parallel to the line whose equation 3x=2y+4

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.