Question

Spending will be more than $84 billion more than… years after 2003

Answer 1

Given:

y = 10.2x + 12.6

Where x is the number of years after 2013.

Let's find the number of years which it will take the spending to be more than $84 billion.

We have the inequality:

84 < 10.2x + 12.6

Let's solve for x.

• Subtract 12.6 from both sides:

84 - 12.6 < 10.2x + 12.6 - 12.6

71.4 < 10.2x

• Divide both sides by 10.2:

`\begin{gathered} (71.4)/(10.2)<(10.2x)/(10.2x) \\ \\ 77 \end{gathered}`

Therefore, the spending will be more than $84 billion more than 7 years after 2003.

ANSWER:

7 years.