A college administration is interested in knowing how much money students spend on their textbooks. Suppose that they asked a sample of 5 students to tell them the cost of their most expensive textbook that semester, and they indicated the following A glance at these data suggests that there is substantial variation in the price of textbooks. Specify the extent of this variability by calculating the standard deviation.

Pls! does anybody know a shortcut for answering these types of questions in the future?

The swimming pool is open when the high temperature is higher than 20∘c. lainey tried to swim on monday and thursday (which was 3 days later). the pool was open on monday, but it was closed on thursday. the high temperature was 30∘c on monday, but decreased at a constant rate in the next 3 days. write an inequality to determine the rate of temperature decrease in degrees celsius per day, d, from monday to thursday.

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.