Answer:
x should equal 16
Step-by-step explanation:
There is no attached picture, but I guess it is like the one I attached.
If so, the first thing is finding the side measure:

Now, radius is half this measure: 15 in.
And circle area is:
-29 into a fraction = -29/1.
to make a whole number into a fraction, just put it over 1
Hello,
Answer B
y=-x^4+1
y'=-4x^3
y"=-12x² is always <0 : concavity downside.