Lesson 05: Comparing Speeds and Prices | Unit 3: Unit Rates and Percentages

Han and Tyler are following a polenta recipe that uses 5 cups of water for every 2 cups of cornmeal. Han says, “I am using 3 cups of water. I will need $$1\frac15$$ cups of cornmeal.” Do you agree with Han? Explain your reasoning.

Han and Tyler are following a polenta recipe that uses 5 cups of water for every 2 cups of cornmeal. Tyler says, “I am using 3 cups of cornmeal. I will need $$7\frac12$$ cups of water.” Do you agree with Tyler? Explain your reasoning.

One gallon of paint can cover 350 square feet. Mai is working on a large art project and needs enough paint to cover 1,750 square feet. She thinks she should use the rate $$\frac{1}{350}$$ of a gallon per square foot to find how much paint is needed. Do you agree with Mai? Explain or show your reasoning.

A car can travel 35 miles per gallon of gas. How far can the car travel with 15 gallons? Show your reasoning.

A car can travel 35 miles per gallon of gas. How much gas does the car use to go 100 miles? Show your reasoning.