The diameter of the circle is 10 units what is the radius of the circle

Which statement accurately explains whether a reflection over the x-axis and a 180° rotation would map figure acb onto itself?

What can you determine about the solutions of this system

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.