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Roofing a home

  One roofing crew can finish a 2,800-sqaure-foot roof in 12 hours, and another crew can do the job in 10 hours. If they work together, can they finish before a predicted rain in 5 hours...

can someone help

1.  Suppose that in a town, everybody drives a Chevy, Ford or Honda.  A survey indicates that of the current Chevy  drivers, 25% will buy a Ford and 30% will buy a Honda next time...

math help!!

If the current market share for each company is Chevy 45%, Ford 35% and Honda 20%, what is the market  share for each company after the purchase of the next car...

Probability

A slot machine has 3 wheels. Each wheel has 10 positions: a bar, and digits 0,1,2... When the handle is pulled the three wheels spin independently before coming to rest. Find the probability of:   Getting...

Two Questions. Both involving plasma bulbs.

Question 1: Why is it that when a flourescent bulb touches or is placed withing 3 inches or less of a plasma globe, it lights up? I did some research on plasma bulbs and the metal ball in the center...

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