The track team is trying to reduce their time for a relay race. First, they reduce their time by 2.1 minutes. They are able to reduce that time by 1/10. If their final time is 3.96 minutes, what was their beginning time?
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Answer:

Answer is 15.7 minutes.

Step-by-step explanation:

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Answer:

6.5 minutes

Step-by-step explanation:

T0 = initial time

T1=T0 - 2.1

T2=T1 x 0.9= 3.96

T1 = 3.96/.9= 4.4

T0=T1+2.1=6.5

(note the 1/10 reduce is shown as 9/10)