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klio [65]
3 years ago
10

The gross federal debt y​ (in trillions of​ dollars) for a certain country in year x is approximated by the following​ equation,

where x is the number of years after 2000. y =1.18x +1.58 In what year will the federal debt be $10.68 trillion?
Mathematics
1 answer:
miskamm [114]3 years ago
3 0

Answer: 2008

Step-by-step explanation:

Given : The gross federal debt y​ (in trillions of​ dollars) for a certain country in year x is approximated by the equation y =1.18x +1.58 , where x is the number of years after 2000.

To find the year in which the federal debt will be $10.68 trillion, we substitute y= 10.68 in the above equation , we get

10.68 =1.18x +1.58\\\\\Rightarrow\ 1.18x=10.68-1.58\\\\\Rightarrow\ 1.18x =9.1\\\\\Rightarrow\ x=\dfrac{9.1}{1.18}=7.7118644067\approx8

The required year will be = 2000+8=2008.

Hence, in 2008  the federal debt will be $10.68 trillion.

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