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Answer:
≈ 14.3 hours
Step-by-step explanation:
The mean is calculated as
mean =
=
=
≈ 14.3 ( to nearest tenth )
7 - 7(x - 7) > -4 + 5x
7 - 7x + 49 > -4 + 5x
56 - 7x > -4 + 5x
-7x - 5x > -4 - 56
-12x > -60
x < -60/-12
x < 5