△x′y′z′ is the image of △xyz under a dilation through point c. xz=4 and x′z′=5 .
what scale factor was used in the dilation?
−1.25
−0.8
0.8
1.25

The administrator of a large assisted living facility wanted to know the average age of the residents living at the facility. he randomly selected 12 residents and determined their age, listed here: 80, 65, 75, 83, 68, 73, 88, 79, 94, 72, 79, 68 what's the average age of the sample of residents? a. 79 years old b. 68 years old c. 75 years old d. 77 years old