Given cost and rate for selling price, find the markup percentage, selling price, and markup amount. Markup is based on cost. 100% с $16.20
? % MS?
140% S $?
Solve for the missing numbers.
100% с
$16.20
D% M $
140% S
(Round to the nearest cent, 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.