You are the shift supervisor at a local restaurant. You note that 15 employees work on Sundays. This represents 60% of all the
restaurant's employees.
How many employees does the restaurant have?

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.

Which of the following contains a variable?

If the value of cos330°is√3/2 then find cos 165°.