In the diagram below, the radii of the two concentric circles are 3 centimeters and 7 centimeters, respectively What is the area of the shaded region?
А
40pi cm2
41pi cm2
8pi cm
80pi cm

Find the solutions for a triangle with a =16, c =12, and b = 63º

What is the area of mnp? 40 m2 60 m2 68 m2 127.5 m2

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.