Travel a toll road

1. A mix for 9 servings of instant potatoes requires 1&1/8 cups of water. Use this information to decide how much water is needed if you want to make 17 servings.
2. You travel a toll road that requires a75-cent token. If you buy a special car-pool sticker for $12.00, then the tokens cost only 55cents and you can use the express lane. At what point is the car-pool plan cheaper?

Sample Solution