The equation \(\text{s} = \sqrt{30\text{f}\text{d}}\) can be used to find a car's speed s in miles per hour given the length d in feet of a skid mark and the friction factor f of the road. Police measured a skid mark of 90 feet on a dry concrete road. If the speed limit is 35 mph, was the car speeding? Explain.
The surface area in square meters of the human body can be found using the expression \(\sqrt{\cfrac{\text{h}\text{m}}{3,600}}\) where h is the height in centimeters and m is the mass in kilograms. Find the surface area of a 15-year-old body with a height of 183 centimeters and a mass of 74 kilograms.
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