Use a Calculator to Find the Sum $\sum _ { k = 4 } ^ { 12 } \frac { - 1 } { k + 2 }$

question 198

Multiple Choice

Use a calculator to find the sum.Round to four decimal places. $\sum _ { k = 4 } ^ { 12 } \frac { - 1 } { k + 2 }$

• A)-0.9682
• B)-2.2516
• C)-0.0714
• D)-0.8968
• E)-1.7516

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Definitions:

Active Transport

The movement of molecules across cell membranes from lower to higher concentration, requiring energy.

Phytoremediation

The use of plants to remove, degrade, or contain environmental pollutants from contaminated soil, water, or air.

Hydrogen Bonds

Weak bonds between partially positively charged hydrogen atoms and other partially negatively charged atoms, significant in the structure of water and biological molecules.

Transpiration

The pathway that water takes, moving from the roots to microscopic pores located on the leaf undersides, where it vaporizes and escapes into the surrounding air.