In the function (5e^x) / (5e^x + 7)

Where is f(x) concave up?

And where is f(x) concave down?

*use interval notation*

11. a particular type of cell doubles in number every hour. which function can be used to find the number of cells present at the end of h hours if there are initially 4 of these cells? a. n = 4 ()" b. n = 4(2)" c. n = 4 + (2)" din = 4 +"

When using the linear combination metho e linear combination method to solve a system of linear equations, the four options are:

Which representation has a constant of variation of -2.5