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 first ten amendments to the Constitution are more commonly known as _________. 

Most software applications include a keyboard shortcut to save the document. What key combination is most often used for saving? 

Directions: Each of the questions or incomplete statements below is followed by four suggested answers or completions. Select the one that is best in each case. Which of the following correlation coefficients represents the weakest relationship between two variables?

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]?