I see your last line is : c(x) = 0.9(x^2-10)^2 + 101.1
Let y = x^2, then c(y) = 0.9(y-10)^2 + 101.1
Apparently, c(y) is a parabola, min is 101.1 when y = 10, max is infinity
So let x^2 = 10 -> x = sqrt(10) or -sqrt(10), min is 101.1, max is infinity
I’m pretty sure the answer is C. I’m not entirely sure.
Answer:
I believe the answer is 90
Step-by-step explanation:
Answer:
No
Step-by-step explanation:
No it is not a perfect square because you can not factor it.
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