This composite figure is made of two identical pyramids
attached at their bases. each pyramid has a height of 2
units.

Find the sum of the first 8 terms of the following sequence. round to the nearest hundredth if necessary.

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.

Common binomial factor of 6x(3x+7)+5(3x+7)