Rachel read 30 minutes for every 10 minutes that she spent watching television. nicolas read 45 minutes for every 15 minutes that he watched television. the ratio of time that rachel and nicolas spent reading to the time they spent watching television is

Which of the following are parts of a sphere

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.

Prove that (x-2)is factor of p (x)=2x³-3x²-17x+30