Break even point is fixed cost divided by contribution margin

When only separate discreet points are graphed it is called?

Find the area of the regular hexagon if a side is 20 cm.

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.