Aspeeding run is 400 yards long with a vertical drop of 30.5 yards. find the angle of depression of the run

What is the value with a place of tenths in 907.456 1) 0 2) 6 3) 4 4) 5

Gh bisects fgi. find the measure of hgi •15° •21° •10° •8°

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.