Students studying fractions manipulate “fraction blocks”, blocks cut to represent fractional parts, to learn the
concept of adding and subtracting fractions. Which level of development as described by Piaget does this
activity demonstrate?
The path of ball thrown into the air is modeled by the first quadrant graph of the equation h = –16t
2 + 64t + 5,
where h is the height of the ball in feet and t is time in seconds after the ball is thrown. What is the average rate
of change in the ball’s height with respect to time over the interval [1, 3]?
Dr. Jenks is working with a group of high school students. They are about to read a science book about fossils.
Before they begin, she writes the words stromatolites, fossiliferous, and eocene on the board. She explains the
meaning of each word. These words are examples of __________