Find the surface area of a cone with slant height of 9 inches and a radius of 3 inches. ANSWERS: 117 in2 81 in2 109 in2 113 in2

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.

What is the slope of the line that contains the points (-2,1) and (0,-3)

Which of the following equations is equivalent to x/3-6/x=1