Use Descartes' Rule of Signs to Determine the Possible Number

question 16

Multiple Choice

Use Descartes' Rule of Signs to determine the possible number of positive and negative zeros of .

• A) no positive reals; no negative reals
• B) 1 positive real; 3 negative reals or 1 negative real
• C) 0 positive real; 3 negative reals or 1 negative real
• D) 3 positive reals or 1 positive real; no negative reals
• E) 3 positive reals or 1 positive real; 3 negative reals or 1 negative real

---

Definitions:

Foramen Ovale

An opening in the septum between the two atria of the heart in the fetus, which normally closes soon after birth.

Phrenic Veins

Veins that drain blood from the diaphragm, important for the return of blood to the heart.

Diaphragm

A dome-shaped, muscular partition separating the thorax from the abdomen in mammals, playing a major role in breathing as its contraction increases the volume of the thorax and so inflates the lungs.

Median Cubital Vein

A superficial vein located in the cubital fossa that connects the cephalic and basilic veins, commonly used for venipuncture.