Answer:
10 hrs to get 350
Step-by-step explanation:
I think Si is more reactive
No this is the awnser-3x+y=2
Ok so we know he used over 700 because he was charged more than 40. Then we take the $8.10 and divide 0.45 into it. This then gives you 18 more minutes. Then add 18 to 700 and you get 718 min.
