Suppose the path of a baseball hit straight up from three feet above the ground is modeled by the first quadrant graph of the function, where is the flight time of the ball in seconds and is the height of the ball in feet. What is the velocity of the ball two seconds after it is hit

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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%)


Suppose the path of a baseball hit straight up from three feet above the ground is modeled by the first quadrant graph of the function<br><img src='https://www.fatskills.com/images3/ftcemath/image_019_048.png'>, where <img src='https://www.fatskills.com/images3/ftcemath/image_019_049.png'> is the flight time of the ball in seconds and <img src='https://www.fatskills.com/images3/ftcemath/image_019_001.png'> is the height of the ball in feet. What is the velocity of the ball two seconds after it is hit