Answer:
$320
Explanation:
First, we can find how many cars they washed.
At 8 hours, they washed 32 cars, and since you still have two hours worth of cars to find, you can divide 16 by 2, and you get 8.
So in total, they washed 40 cars.
Now, you can multiply 40 by $8.00, and you get $320.