If the sales tax rate in your state is 6 1/2 %, what is the tax on your purchase of shoes costing $22.99

Evaluate cos2θ for cosθ = square root of 3/2

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.

Iam at home. /: i am playing video games. translate the following statement into symbolic form.