Dr. hall files 320 insurance claims every month. If 5% of those claims are rejected, how many claims are rejected?how many are accepted?

Anyone know? will mark brainliest if correct

Which expression gives you the distance between the points (5,1)and(9,-6)

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.