Automobiles traveling on a road with a posted speed limit of 65 miles per hour are checked for speed by a state police radar system.The following table is a frequency distribution of speeds. 
What proportion of the cars traveled at least 55 but less than 65 miles per hour?
Definitions:
Maximize Profit
The process or strategy focused on increasing a firm's earnings to the highest possible level.
Demand Conditions
The factors affecting the desire of consumers to purchase a product or service, including price, income levels, and preferences.
Competitive Price-Searcher
A market participant who must examine prices set by competitors to determine their own pricing strategy due to a lack of fixed market price.
Future
A term referring to events that have not yet occurred or the time period in which these events will happen.
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