Without graphing, find the slope of the line that goes through
(2,-1) and (6, 1).

The mean of a set of data is -3.82 and its standard deviation is 2.31. find the z score for a value of 3.99.

Antonio made a scale model of a building. the model's scale is 1 inch to 235 feet and its height is 3.5 inches. what is the exact height of the actual building? enter your answer in the box.

Jane moves from a house with 71 square feet of closet space to an apartment with 45.44 square feet of closet space. what is the percentage decrease of jane’s closet space?