Consider the following game of chance based on the spinner below: each spin costs $3. if the spinner lands on b the player wins $8, if the spinner stops on c the player wins a dime otherwise the player wins nothing. calculate the players expected winnings. express your answer to at least three decimal places in dollar form.

Ascientist wants to use a model to present the results of his detailed scientific investigation. why would a model be useful? a )because the model makes the concepts easier to understand b) because the model is easy to put together and to use c) because the model prevents other scientists from asking questions d) because the model requires the audience to pay full attention to it i don't know what to choose because between a and d a is much more likely than d because it only wants to get the attention of the audience. i'm confuse.

If the discriminant if a quadratic equation is 4 which statement describes the roots?

A50% increase followed by 33 1/2% decrease