Answer:
2
Step-by-step explanation:
The shape expanded in size by a factor of 2. So the dilation scale factor is 2
10 km because you have 1 cm left over after you make 8 km with the 5cm so you just divide 8 by 4 and get 2km then add that to the 8 to get 10.
The equation would be d/r.
The cost of company 1: 10x+50
The cost of company 2: 8x+60
The cost will be the same at:

The answer is 5 hours