Heidi went to Joe's Market and bought 12 pounds of coffee at $8 a pound and 6 pounds of rice at $0.40 per pound. If Heidi paid for her purchase with a $50 bill, how much change did she receive?​

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.

Atotal of 766 tickets were sold for the school play. they were either adult tickets or student tickets. there were 66 more student tickets sold than adult tickets. how many adult tickets were sold?

Analyze the diagram below and complete the instructions that follow. how to find tan