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Winning Decimals - Answer Key

Extension activity answer key.
Grades
3 |
4 |
5
Subjects
Type
Activity (2,894)

Name ___________________________________________ Date _________________

To qualify for NASCAR’s Daytona 500, car racers must achieve an average speed of 171.6 miles per hour. Below are the results of a qualifying race.

Racer

Average Speed (Miles Per Hour)

Racer

Average Speed (Miles Per Hour)

Bobby Labonte

180.342

Tony Stewart

176.901

Ward Burton

173.712

Ricky Rudd

172.124

Dale Jarrett

172.224

Mark Martin

180.348

Dale Earnhardt

181.159

Rusty Wallace

171.599

Sterling Marlin

171.066

Jeff Gordon

173.756

  1. Which racers did not qualify? (Sterling Marlin and Rusty Wallace)


  2. Who was faster, Dale Jarrett or Ricky Rudd? (Dale Jarrett)


  3. Who was faster, Ward Burton or Jeff Gordon? (Jeff Gordon)


  4. Assuming the racers maintained these average speeds in the actual race, who would come in first, second, and third place? (1st place, Dale Earnhardt; 2nd place, Mark Martin; 3rd place, Bobby Labonte)


  5. How many thousandths of a mile per hour faster did Rusty Wallace need to drive in order to qualify? (one thousandth of a mile per hour)


  6. Who should come in fourth? (Tony Stewart)


  7. Of the qualifiers, who should come in last place? (Ricky Rudd)


  8. How many tenths of a mile an hour did Ricky Rudd need to increase his speed in order to match Dale Jarrett’s speed? (one tenth)


  9. How many thousandths of a mile per hour did Bobby Labonte need to increase his speed in order to match Mark Martin’s speed? (6 thousandths of a mile per hour)


  10. If next year’s race officials decide to raise the qualifying speed to 172.2, which speeds above will not qualify? (Sterling Marlin, Rusty Wallace, Ricky Rudd)

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