Please tell me b. Do not want to think right now. Thanks.

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

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.