Quakerbrat wrote:Question #4
Which of the following circles has the greatest number of points of intersection with the parabola x^2 = y + 4?
I thought about this intuitively, thinking that a circle with radius 4 would hit the parabola at its x intercept as well as crossing the parabola at 2 other points, but clearly I was wrong.
Is there a concise mathematical way to solve this?
A total of x feet of fencing is to form three sides of a level rectangular yard. What is the maximum possible area of the yard, in terms of x?
I thought about it this way:
Area = W x L, from the constraints I know that 2W + L = x or 2L + W = x. Unfortunately, that's about as far as I get.
zuluyankee wrote:Everytime we have a "which is the best approximation of" question, how do we judge it is best?
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