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and thank you

Write each expression in exponential form and find its value. 2 x 2 x 2 x 2

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.

What is the name used to describe a graph where for some value of x, there exists 2 or more different values of y?