$\begin{array}{|l|c|c|}
\hline {\text { Item }} & \text { Quantity Needed } & \text { Cost } \
\hline 8 \text { Spark plugs } & 1 \text { set } & \$ 31.84 \
\text { Spark plug wires } & 1 \text { set } & \$ 73.92 \
\text { Distributor cap } & 1 & \$ 24.16 \
\text { Rotor } & 1 & \$ 9.10 \text { each } \
\text { Labor } & \text { Flat rate } & \$ 80.00 \
5 \% \text { sales tax on } & & \
\text { parts only } & & \
\hline
\end{array}$ Use the accompanying figure. How many more feet does it take to stop a car at 30 mph than at 20 mph?
A) 10
B) 20
C) 30
D) 40

Question

Quizplus · Accepted Answer

From the figure, we can see that at 20 mph, the stopping distance is about 75 feet. At 30 mph, the stopping distance is about 115 feet. The difference between the two is 40 feet. Therefore, the answer is (D) 40.

Use the Accompanying Figure