Traci has a coupon for $250 on a box name-brand cereal that normally costs
$12.78. The store-brand cereal costs
$10.98.
How much will Traci save if she uses her
coupon and buys the name-brand cereal
instead of the store-brand cereal?

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.