The function S(D) = VzD can be used to approximate the speed S in miles per hour of a car that has left skid marks of length D, in feet. How fast would the car have been traveling if it left a skid mark that is 106.02 feet long? Round to the nearest integer. Clearly state your final answer in a complete sentence with proper grammar and correct spelling.
Added by Daniel M.
Step 1
02 feet. Show more…
Show all steps
Close
Your feedback will help us improve your experience
Mukesh Devi and 89 other Algebra educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Speed of a Skidding Car. Police can estimate the speed at which a car was traveling by measuring its skid marks. The function given by $$r(L)=2 \sqrt{5 L}$$ can be used, where $L$ is the length of a skid mark, in feet, and $r(L)$ is the speed, in miles per hour. Find the exact speed and an estimate (to the nearest tenth mile per hour) for the speed of a car that left skid marks (a) 20 ft long; (b) 70 ft long; (c) 90 ft long. See also Exercise $102 .$
Exponents and Radicals
Multiplying Radical Expressions
When a car makes an emergency stop on dry pavement, it leaves skid marks on the pavement. The speed S, in miles per hour, of the car when the brakes were applied is related to the length L, in feet, of the skid mark. The relationship is S(L) = 5.05 L . (a) Use functional notation to express the speed at which the skid mark will be 70 feet. S 70 Calculate that speed. (Round your answer to two decimal places.)
Pritesh R.
Under certain conditions, police can estimate the speed at which a car was traveling by measuring its skid marks. The function given by $r(L)=2 sqrt{5 L}$ can be used, where $L$ is the length of a skid mark, in feet, and $r(L)$ is the speed, in miles per hour. Find the exact speed and an estimate (to the nearest tenth mile per hour) for the speed of a car that left skid marks (a) $20 mathrm{ft}$ long; (b) $70 mathrm{ft}$ long; (c) $90 mathrm{ft}$ long.
Joelle I.
Recommended Textbooks
Elementary and Intermediate Algebra
Algebra and Trigonometry
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD