The formula s = the square root of 18d can be used to fnd the speed s of a car in miles per hour when the car needs d feet to come to a complete stop after slamming on the brakes. If it took a car 12 feet to come to a complete stop after slamming on the brakes, estimate the speed of the car.
The formula s=18d⎯⎯⎯⎯⎯⎯√ can be used to find the speed s of a car in miles per hour when the car needs d feet to come to a complete stop after stepping on the brakes. If it took a car 25 feet to come to a complete stop after stepping on the brakes, estimate the speed of the car. Truncate the value of 18d⎯⎯⎯⎯⎯⎯√ , when d=25 , to the tenths place.
Make D the subject of formula s =
Well, let me put on my thinking clown nose for this one. If we plug in d = 12 into the formula, we get s = the square root of 18 times 12. Now, finding the square root of 18 might sound a bit square, but let's give it a shot. The square root of 18 is approximately 4.24264. So, the estimated speed of the car would be around 4.24264 miles per hour. But hey, let's hope the driver isn't in a hurry to get anywhere at that speed!
To estimate the speed of the car, we can use the formula s = √(18d), where s represents the speed in miles per hour and d represents the distance in feet it takes for the car to come to a complete stop after slamming on the brakes.
In this case, we are given that the car needs 12 feet to come to a complete stop (d = 12).
To estimate the speed, we can substitute the given value of d into the formula:
s = √(18 x 12)
Now, let's solve this equation step by step:
1. Multiply 18 by 12:
s = √(216)
2. Take the square root of 216:
s ≈ 14.7
Therefore, the estimated speed of the car is approximately 14.7 miles per hour.