The original selling price of a single share of stock was d dollars. the selling price for a share of the same stock on a later date was represented by the expression 0.8(1.25d). which description could explain what happened to the price of the share of stocks? a. the price increased by 25% and then decreased by 20%. b. none c. the price increased by 1.35% and then decreased by 15%. d. the price increased by 135% and then decreased by 85%. e. the price increased by 35% and then decreased by 0.15%.

Alicia puts $400 in a bank account. each year the account earns 5% simple interest. how much money will be in her bank account in six months?

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.

Two airplanes start at the same place and travel in opposite directions,one at 395 miles per hour and the other at 422 miles per hour. how many hours will it take for the planes to be 2451 miles apart?