Choose the One Alternative That Best Completes the Statement or Answers

question 28

Multiple Choice

Choose the one alternative that best completes the statement or answers the question.
Approximate the area under the curve and above the x-axis using n rectangles. Let the height of each rectangle be given
by the value of the function at the right side of the rectangle.
- $$f ( x ) = 2 x ^ { 2 } + x + 3 \text { from } x = - 2 \text { to } x = 1 ; n = 3$$

• A) 25
• B) 13
• C) 17
• D) 21

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Definitions:

Secondary Lymphatic Organ

Sites where immune responses are organized, including lymph nodes, spleen, and tonsils, which filter lymph or blood and house mature lymphocytes.

Spleen

An organ adjacent to the stomach that filters blood, disposes of worn-out red blood cells, and helps fight infection.

Lymph Node

Encapsulated mass of lymph tissue found among lymph vessels.

Thymus Gland

An immune system gland located behind the sternum that produces T-cells for the adaptive immune response.