Final answer:
To determine the horizontal projection and width in inches, use given proportions and unit scales to maintain accurate measurements. The older rule suggested 5 inches side-to-side, now up to 8 diameters, with proper scaling to real-life dimensions.
Step-by-step explanation:
The question is asking to determine the minimum horizontal projection and width of an object in inches. To find this value, we need to consider the given rule of thumb proportions and apply them to the unity scale provided. The older rule suggested 5 inches side-to-side and 7-8 inches deep, whereas recent suggestions indicate up to 8 diameters side-to-side and 15 diameters deep. When translating these measurements into a consistent unit like inches, we use proportions to ensure accuracy. For example, if the width scale to actual width is expressed as w/10 and we want this to be in balance with another unit scale of 0.5/5, we can set up a proportion as such:
Width=w/10=0.5/5
By solving this proportion, we find that w=3 inches. To represent a line 500 feet long in a scale, a unit scale of 2(1/2) inches in length would be used. Conversely, a line 4 inches long on the scale would represent an actual distance of 800 feet. Thus, when expressing dimensions in scale, it is crucial to maintain consistent units and understand how scale ratios work to represent real-life measurements accurately.