Which measure describes the standard error of the mean? A. the central limit theorem B. the sample mean C. the confidence interval D. the standard deviation of the means

When turned about its axis of rotation, which shape could have created this three-dimensional object?

Abox contains 1 plain pencil and 4 pens. a second box contains 5 color pencils and 5 crayons. one item from each box is chosen at random. what is the probability that a plain pencil from the first box and a color pencil from the second box are selected? write your answer as a fraction in simplest form.

Find the cosine function that is represented in the graph.