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lesantik [10]
2 years ago
10

it takes Cynthia 12 hours to proof a chapter of Hawkes Learning Systems' Intermediate Algebra book and it takes Phillip 3 hours.

How long would it take them working together? (Round your answer to two decimal places.)
Mathematics
1 answer:
Reika [66]2 years ago
3 0
It will take them 4 hours.
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