Question 1208250
<font color=black size=3>
When the kid asks, the car has already traveled 50.75 miles.
They need to travel another 65x miles  (due to the formula distance = rate*time) where x is the extra number of hours needed to travel this distance.
The total distance is 65x+50.75
Set this equal to 668.25 and solve for x.


65x+50.75 = 668.25
65x = 668.25-50.75
65x = 617.5
x = 617.5/65
x = <font color=red>9.5 hours</font> is the answer.


Check:
65*x+50.75 = 65*<font color=red>9.5</font>+50.75 = 668.25
This confirms the answer.
</font>