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Mathematics 7 Online
OpenStudy (anonymous):

Can someone help me with this question. A plumber's assistant's rate of pay is $0.75 per cubic foot of earth moved. He moves 220 cubic feet of earth to dig a trench. He moves the same amount to fill the trench. What is his pay for this job? $ ____

OpenStudy (anonymous):

how much dirt did he move in total?

OpenStudy (anonymous):

220 cubic feet

OpenStudy (anonymous):

220x0.75

OpenStudy (anonymous):

165 he got paid for the whole job

OpenStudy (anonymous):

well, he moved it once to dig it, and he moved the same amount again to fill it in. so he moved 220 x 2. But once you get that, you are right, you multiply by the price per cubic foot.

OpenStudy (anonymous):

220x2=440 440x0.75=330

OpenStudy (anonymous):

so he got paid 330

OpenStudy (anonymous):

Looks good...

OpenStudy (anonymous):

thank you

OpenStudy (anonymous):

but it says find the volume????

OpenStudy (anonymous):

I thought it said: "What is his pay for this job?" $______

OpenStudy (anonymous):

Find the volume and solve the application. what's this means

OpenStudy (anonymous):

Not sure... What I see is that in order to find how much he gets paid (maybe that's the application??), first you have to find total volume moved. So: Total volume = 2 x "dirt dug from ditch" = 2 x 220 = 440 Pay for job = 0.75 x total volume = 0.75 x 440 = $330

OpenStudy (anonymous):

ok that's make sense

OpenStudy (anonymous):

I think this is one of those where you can do the math, but the way they word the problem is confusing.

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