Consider a little league team that has 15 players on its roster. (a) how many ways are there to select 9 players for the starting lineup?

What is the approximate circumference of the circle shown below?

With both problems. a.s.a.p directions on photo ^

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.