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  3. the formula v= ?2.5r models the safe maximum speed

The formula v= ?2.5r models the safe maximum speed, v, in miles per hour, at...

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The formula v= ?2.5r models the safe maximum speed, v, in miles per hour, at which a car can travel on a curved road with radius of curvature, r, in feet. A highway crew measures the radius of curvature at an exit ramp as 810 feet.What is the maximum safe speed?A. 81 miles per hourB. 50 miles per hourC. 42 miles per hourD. 45 miles per hour

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