1. Consider the polynomial function.

f(x)=x^42x^3+11x^2+5x+6

Which statement correctly describes the number of possible positive zeros and the number of possible negative zeros?

The number of positive zeros is either 3 or 1. The number of negative zeros is 1.

The number of positive zeros is 1. The number of negative zeros is either 3 or 1.

The number of positive zeros is either 2 or 0. The number of negative zeros is either 2 or 0.

The number of positive zeros is either 3 or 1. The number of negative zeros is either 2 or 0.

1. What is the lower bound of the polynomial function?

f(x)=x^44x^39x^2+x16

lower bound = _____

1. A whispering chamber is an elliptically arched chamber. A unique feature of a whispering chamber is that when a person standing at one focus of the ellipse whispers, he can be heard by a person standing at the other focus, regardless of the dimensions of the ellipse from which the dome is built.

Suppose that the dimensions of the ellipse used to make a whispering dome is 200 feet by 380 feet. Walter stands at one focus, and Barbara stands at the other focus.

How far apart are Walter and Barbara?

Round to the nearest tenth of a foot