Tamara goes on a spring break trip with her school to visit historical sites in Italy. She purchases $200 of souvenirs while on the trip. She gets back to the U. S. and opens her credit card statement. What will be the balance in her account, assuming she had a zero balance prior to making these purchases and didn't make any other purchases? $206.00

$200.00

$0.00

$6.00

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.