The circle of radius r centered at (h, k) has equation
.. (x -h)^2 +(y -k)^2 = r^2
Selection A is appropriate.
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It would be helpful if you would use appropriate math symbols. 102 is very different from 10^2. (Copying and pasting does not work--editing is needed.)
Evaluate the given function in x=-4.
This is, replace the x in the function for -4 and find the value of g(-4).
![\begin{gathered} g(x)=x^2-4x \\ g(-4)=(-4)^2-4(-4) \\ g(-4)=16+16 \\ g(-4)=32 \end{gathered}](https://tex.z-dn.net/?f=%5Cbegin%7Bgathered%7D%20g%28x%29%3Dx%5E2-4x%20%5C%5C%20g%28-4%29%3D%28-4%29%5E2-4%28-4%29%20%5C%5C%20g%28-4%29%3D16%2B16%20%5C%5C%20g%28-4%29%3D32%20%5Cend%7Bgathered%7D)
The value of g(-4) is 32.
The initial value is 4 and the rate of change is -3/4
The temperature would be about 54.