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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The Praxis Mathematics (5165 ) Exam is a test required by many states for credential candidates planning to teach mathematics at the high school level. It is a single, computer-delivered test that includes questions from two content categories.

The first content category includes Number and Quantity, Algebra, Functions and Calculus. The second content category includes Geometry, Probability and Statistics, and Discrete Mathematics.

The test consists of various question types including selected-response, numeric entry, drag-and-drop and text completion.


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<img src='https://www.fatskills.com/images3/praxismath/image_017_194.png'/>, where <img src='https://www.fatskills.com/images3/praxismath/image_017_195.png'/> is the flight time of the ball in seconds and <img src='https://www.fatskills.com/images3/praxismath/image_017_150.png'/> is the height of the ball in feet. What is the velocity of the ball two seconds after it is hit?