Question

Please help me on 13 I don’t know what I did wrong

Answer 1

Given:

`T(x)=(500,000)/(x^2+400)`

Asked: At what range distances from the fire's center is the temperature less than 400 degrees Celsius?

Solution:

T(x) < 400 degrees Celsius

We will find x using the given by substituting T(x) < 400.

`\begin{gathered} T(x)=(500,000)/(x^2+400) \\ (500,000)/(x^2+400)<400 \\ (500,000)/(400)29.2 \\ At\text{ distances greater than 29.2m, the temperature is less than 400 degr}ees\text{ Celsius.} \end{gathered}`

ANSWER: (29.2,infinity)