SOLUTION: To supply a small factory with enerygy costs $580 per week when it is open 5 days a week for 8 hours a day. Find how much energy it will cost to supply the factory with energy if t

Algebra ->  Rate-of-work-word-problems -> SOLUTION: To supply a small factory with enerygy costs $580 per week when it is open 5 days a week for 8 hours a day. Find how much energy it will cost to supply the factory with energy if t      Log On


   

Question 406717: To supply a small factory with enerygy costs $580 per week when it is open 5 days a week for 8 hours a day. Find how much energy it will cost to supply the factory with energy if the working day is extended to 9.5 hours?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi

To supply a small factory with enerygy costs $580 per week when it is open 5

 days a week for 8 hours a day. Find how much energy it will cost to supply the

 factory with energy if the working day is extended to 9.5 hours?

Let x represent cost for 9.5hr working day

Question states*** Sets Up the Proportion

 %24580%2F40+=+x%2F+47.5

Solving for x by cross multiplying

  40x = $580*47.5

    x = $580*47.5/40

    x = $688.75

CHECKING our Answer***

 %24580%2F40+=+14.5+=++688.75%2F+47.5