4
QuizMultiple Choice

Introduction to Scientific Notation — Unit test

Question 4 • HOPE Scholars- Math Grade 8

Coach Burns charted the change in his runners’ 5K times from the first race of the year to the second race of the year. Which student improved the most by decreasing the time needed to run the race?Overall Change in 5K Times from the First to the Second RaceRunnerTime over (+) or under (–) previous runAlbert–15.7 secondsCody+1.4 secondsHannah+4.5 secondsYasim–37.4 seconds

Answer
A
Albert
B
Cody
C
Hannah
D
Yasim

Explanation

A negative change means the runner took less time in the second race, so that runner improved. Albert’s time decreased by 15.7 seconds, while Yasim’s decreased by 37.4 seconds; Cody and Hannah’s times increased. Since 37.4 seconds is the greatest decrease, Yasim improved the most.

AI-written and checked against the verified answer.

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