Katrina is shopping for berries that cost $2.19 per pound. she has 4.5 pounds of raspberries and 3.25 pounds of blueberries in her shopping cart. which expression shows the total cost in dollars of the berries in her cart?

Which number produces a rationale number when multiplied by 1/5

Use sigma notation to represent the following series for 9 terms.

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.