Unit rates and unit ratios. A unit rate is a ratio that has a denominator of 1. A unit rate is also called a unit ratio. (They mean the same thing.). $\frac{5}{4}$ and $3:8$ and $40\mbox{ to }10$ are ratios, but they are not unit ratios. $\frac{1.25}{1}$ and $0.375:1$ and $4\mbox{ to }1$ are unit ratios. unit rate is also called a unit ratio. (They mean the same thing.). $\frac{5}{4}$ and $3:8$ and $40\mbox{ to }10$ are ratios, but they are not unit ratios.
I found the following references to Coca-Cola Zero launching in the US in 2005: 1  Associated Press March 21, 2005 announcement that the product would launch in June - http://www.nbcnews.com/id/725792...  Case study by ATTIK, which provided worldwide branding services, citing a 2005 launch - ATTIK.
Soda is an unhealthy beverage because it's high in calories and sugar but low in vitamins and minerals. Coca-Cola is one example of a type of soda that's sugary and packed with calories, but Coke Zero is one alternative that is sugar-free. The primary difference between Coca-Cola and Coke Zero is that Coke Zero contains zero calories, hence it's name, but that doesn't mean it's more nutritious than regular Coke. Calorie and Carb Counts :-. The primary difference between Coca-Cola and Coke Zero is the calorie and carb counts.