A rainbow pattern is designed from semi-circles as shown below. Which of the following gives the area A of the shaded region as a function of

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FTCE Math 6-12 Test: Florida teacher certificate candidates are required to pass this test which covers mathematics for grades 6-12.

There are 75 multiple-choice questions, broken up into graphic, direct question, sentence completion, command, word problem, and selection items.

The FTCE Math 6-12 exam has ten competencies:

Algebra (13%)
Advanced Algebra (12%)
Functions (8%)
Geometry (15%)
Coordinate Geometry (6%)
Trigonometry (7%)
Statistics and Probability (10%)
Calculus (9%)
Mathematical Reasoning (5%)
Instruction and Assessment (15%)


A rainbow pattern is designed from semi-circles as shown below.<br><img src='https://www.fatskills.com/images3/ftcemath/24'> Which of the following gives the area <i>A</i> of the shaded region as a function of <img src='https://www.fatskills.com/images3/ftcemath/image_018_001.png'>