In 4 hours if you count the miles by the road linking the 2 buses. This is because 55 for one bus and 45 for the other bus added together equals 100 miles/hour. Therefore, 4 hours will be the time the 2 buses are 400 miles apart.
Blender total cost (c) = 1.06(0.7c)+6. Here, with c = $65,
Blender total cost ($65) = 1.06(0.7)($65) + 6 = $48.23

<u>The answer is...</u>
<u />
C. 9
Hopefully, this helps you!!

YOU ARE SMART YOU CAN DO THIS