$\"\"$

The formula is $\"\"$ , where s = vehicle $\"\"$ s speed in miles per hour and d = length in feet of the skid marks on dry concrete.

The value of $\"\"$ is substitute in the formula $\"\"$ .

$\"\"$

Multiply each side by 54.

$\"\"$

Take square root each side.

$\"\"$

The speed of the car is $\"\"$ .