Word problem: plugging in for t, it says I am wrong  TOPIC_SOLVED

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Word problem: plugging in for t, it says I am wrong

Postby Idontunderstand on Wed Aug 29, 2012 8:34 pm

Okay Algebra gurus I am completely stumped on this and would love your input. I have solved most of the equation but when I input the months for "t" in the equation N(t) at the bottom it says I am wrong. If someone can show me in detail how you came up with your answer that would be great. Thanks in advance!!!

The president of a major housing construction firm reports that the number of construction jobs (in millions) created is given by N(x) = 1.38x where x denotes the number of housing starts.

Suppose the number of housing starts in the next t months is expected to be x(t) = 8(t + 10)^2/(t + 10)^2 + 2(t + 15)^2 million units.

Find an expression for the number of jobs created in the next t months. N(t) = 11.04[(t+10)^2/(t+10)^2+2(t+15)^2]

How many jobs will have been created 6 months and 12 months from now? (Round your answers to two decimal places.)
6 months=______million jobs
12 months=_____million jobs
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Re: Word problem: plugging in for t, it says I am wrong

Postby maggiemagnet on Thu Aug 30, 2012 1:53 am

Idontunderstand wrote:...when I input the months for "t" in the equation N(t) at the bottom it says I am wrong.

What is your answer. What is "it" that says you're "wrong"? If someone can show me in detail how you came up with your answer that would be great. Thanks in advance!!!

Idontunderstand wrote:Find an expression for the number of jobs created in the next t months. N(t) = 11.04[(t+10)^2/(t+10)^2+2(t+15)^2]

Where did this equation come from? Please show your steps. Thanks!
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Re: Word problem: plugging in for t, it says I am wrong  TOPIC_SOLVED

Postby Idontunderstand on Thu Aug 30, 2012 2:46 am

N(t) = 11.04[(t+10)^2/(t+10)^2+2(t+15)^2]

the function wants to know how many million jobs are created in "t" months so therefor I plugged in 6 for "t"

11.04[(6+10)^2/(6+10)^2+2(6+15)^2]

11.04(256/256+882)
11.04(256/1138)
11.04(.2249560633)= 2.48 million jobs

nevermind I think I got it right must been have a simple error on my part once i correctly followed the order of operations I got it correct thanks!!!
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