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I need help with 7, 9a and 9b. Mainly #7 !!!

I need help with 7, 9a and 9b. Mainly #7 !!!-example-1
User GordyD
by
5.5k points

1 Answer

6 votes

Answer:

9 and 9a answer is

3 per hour

and

14 hours

User Clucking Turtle
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5.7k points