Which of the following Constance can be added to X squared +2/3 ex to form a perfect square trinomial? 1/9, 4/9 or 4 1/9

Simplify (1/2)4th power a. (1/16) b.(1/8) c.(1/4)

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.

The scatter plot shows the number of animal cells clara examined in a laboratory in different months: plot ordered pairs 1, 20 and 2, 60 and 3,100 and 4, 140 and 5, 180 what is the approximate predicted number of animal cells clara examined in the 9th month?