Which of the following descriptions of the carbon cycle is most accurate?

a.it is an open system because the amount of the carbon in the system stays constant.

b.it is an open system because the amount of carbon in the system is variable.

c.it is a closed system because the amount of carbon in the system stays constant.

f(x) = x³ + 8x² + 5x - 14

General Formulas and Concepts:

Pre-Algebra

Distributive Property

Algebra I

Terms/Coefficients/DegreesExpand by FOIL (First Outside Inside Last)Binomial Roots

Step-by-step explanation:

Step 1: Define

Zeros x = 1, -2, -7

Step 2: Find Polynomial

Rewrite zeros:                           f(x) = (x - 1)(x + 2)(x + 7)Expand [FOIL]:                           f(x) = (x² + 2x - x - 2)(x + 7)Combine like terms (x):             f(x) = (x² + x - 2)(x + 7)Expand [Distribute]:                  f(x) = x³ + x² - 2x + 7x² + 7x - 14Combine like terms (x²):           f(x) = x³ + 8x² - 2x + 7x - 14Combine like terms (x):             f(x) = x³ + 8x² + 5x - 14