What are the coordinates of R′ for the dilation D(0.5, P)(PQRS)?​

6e14 is the answer.

dilation scale factor 2: starting with δabc, draw the dilation image of the triangle with a center at the origin and a scale factor of two. notice that every coordinate of the original triangle has been multiplied by the scale factor (x2). dilation with scale factor 2, multiply by 2.