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Mathematics, 17.12.2020 22:40 Nismo3501037

A family's cell phone plan costs $90 per month for 1,000 minutes and 30 cents per minute over the limit. This month the family paid $109.50. By how much time did they exceed their
plan?

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A family's cell phone plan costs $90 per month for 1,000 minutes and 30 cents per minute over the l...
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