What solid 3D object is produced by rotating the semicircle about line \blue mmstart color #6495ed, m, end color #6495ed?

Tcan be concluded that % of the seniors would prefer to see more candid pictures in this year's edition of the yearbook.

Can someone pls ! pls answer all. no explanation needed..

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.