Which inequality represents this statement? A number is at least 12.

n>12

n≤12

n≥12

n<12

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.

The blue segment below is a diameter of o. what is the length of the radius of the circle?

Three lines meet at a point. set up and solve an equation to find the value of (a) is your answer reasonable? explain how you know