Lines I and m are parallel. If angle a measures 35°, what is the measure
of angle d?
a
m
d
A
35°
B
55°
C 145°
D 180°

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.