Question

An electric drag racer is much like its piston engine counterpart, but instead it is powered by an electric motor running off of onboard batteries. These vehicles are capable of covering a 14 mile straight-line track in 11 s .

I'm getting the correct answers but not sure where I'm going wrong with the rounding?

Part A Determine the acceleration of the drag racer in units of m/s2. (Assume that the acceleration is constant throughout the race.) Express your answer in meters per second squared to two significant figures. 6.7 m/s2 Previous Answers Correct Part B How does the value you get compare with the acceleration of gravity? It is equal to the acceleration due to gravity. It is greater than the acceleration due to gravity. It is less than the acceleration due to gravity. Previous Answers Correct

Part C Calculate the final speed of the drag racer in mi/h. Express your answer in miles per hour to two significant figures. 164.86 mi/h Check the rounding in your final answer. No credit lost. Try again.

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Answer #1

Answer must be in two significant figures.

164.86 mi/h in two significant figures is 160 mi/h

So, the answer to part C is

160

mi/h

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