Mike walked 3 miles in 45 minutes. What was his rate in miles per hour? A 1/4 miles per hourB 2 1/4 miles per hour C 4 miles per hour D 15 miles per hour

Negative 5 1/12 + negative 4 1/4 + 6 3/4

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.

Apyramid fits exactly inside a cube. the cube and the pyramid share the same square base, and they are both exactly the same height. the volume of the cube is 66 cubic inches. what is the volume of the pyramid? explain your answer. answer asap