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Build and Select Function Models
Grade Level
GRE
QR.160 Build and Select Function Models
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A tank fills at 10 liters per minute for 6 minutes, then drains at 8 liters per minute. Which model gives volume V(t) for t minutes after filling begins, until the tank empties?
A
V(t) = 10t for 0 <= t <= 6; V(t) = 60 - 8(t - 6) for 6 < t <= 13.5
B
V(t) = 10t for all t >= 0
C
V(t) = 10t - 8t for all t
D
V(t) = 60 + 8(t - 6) for t > 6
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