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.
4 answers
s = sqrt(18*12) = 12 sqrt(6)
14.7 MPH
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 =
4 answers