On a test track with the given drag factor, a test driver hit the brakes once the car had reached the given speed. Use the formula $s=\sqrt{30 \mathrm{df}}$ to find the length of the skid marks the car made if it was traveling at $50 \mathrm{mph}$ on concrete ( $\mathrm{f}=0.95)$. Round to the nearest foot if necessary.
A) 83 feet
B) 81 feet
C) 88 feet
D) 85 feet

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The Answer of On a test track with the given drag factor, a test driver hit the brakes once the car had reached the given speed. Use the formula $s=\sqrt{30 \mathrm{df}}$ to find the length of the skid marks the car made if it was traveling at $50 \mathrm{mph}$ on concrete ( $\mathrm{f}=0.95)$. Round to the nearest foot if necessary.
A) 83 feet
B) 81 feet
C) 88 feet
D) 85 feet

On a Test Track with the Given Drag Factor, a Test