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PLEASE HELP: PART 1
Lisbeth runs on the track team. After practicing for 4 weeks, she lowers her time in the 800 meter run by 20 seconds.
Which expression can you use to calculate the average change in seconds per week?
A.-800÷4
B.-20÷4
C.20÷4
D.800÷4
Part 2
Evaluate the expression that represents the scenario.
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