Trong không gian vecto R^4

Sasha drank 8 bottles of water everyday for a week. how many bottles of water did she drink in total?

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a. m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?

Which of the following describes the symmetry of the graph of y = x3?