Point G is the centroid of triangle ABC. The length of segment CG is 6 units greater than the length of segment DG.
What is CD?
a.6 units
b.12 units
c.18 units
d.24 units

Acertain standardized? test's math scores have a? bell-shaped distribution with a mean of 520 and a standard deviation of 105. complete parts? (a) through? (c)

Find the perimeter of the triangle with vertices  d(3, 4),  e(8, 7), and  f(5, 9). do not round before calculating the perimeter. after calculating the perimeter, round your answer to the nearest tenth.  

25 ! i need asap! ! ill mark brainliest!