Final answer:
A ratio of 1 to 12 indicates one unit of the first quantity for every twelve units of the second. Ratios form proportions, as seen in health sciences' solutions like 1:1000 or geographical scales. Understanding how to convert to unit rates and scales is crucial in many fields.
Step-by-step explanation:
To describe a ratio such as 1 to 12 in words, it means for every single unit of the first quantity, there are twelve units of the second quantity. A proportion is when two ratios are set to be equal, and a unit scale is another form of ratio used to compare dimensions of an actual object with those of a model. For example, if we're given Length=1/50=0.5/5, we can form a proportion setting 1/50 equal to the unit scale.
Health sciences often require the understanding of ratios and proportions, for instance, a ratio solution in health sciences could be 1:1000, indicating a specific concentration of a substance. Practical examples of a unit rate might be 55 miles per hour, representing 55 miles per each hour, while in geography, a map might have a unit scale such as 1 inch equals 100 feet.
Understanding ratios, proportions, unit rates, and scales are essential in various fields, from health sciences to engineering and geography. One must often convert these ratios into a unit rate or unit scale to solve real-world problems or understand diagrams and models correctly.