Answer:
10 problems
Explanation:
The ratio can be used to find the number of problems left. Then, you can add all the problems together to find your final answer.
The total cost for a car with 30 miles is $20.00.
First, do 0.5 × 30 because you need to find out how much it will cost. This will give you 15. From there, add the flat rate. 15 + 5 = 20, so it will cost $20.00.
.18
.90
but i don't recognize that currency
hope this helps