Respuesta :

100sciamachy001
The answer is B because the difference from 20 hrs. of training to 10 hrs. of training is 100 dollars.
tramserran

Answer: D

Step-by-step explanation:

10 hours = $1100  

20 hours = $1200  

10 hours additional training = $100 more

so, for every 1 hour of additional training, he earns $10 more