Can someone help me with these? (look at the image)

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 +"

Write the expression in complete factored form. 5n_(c - 3) - n(c - 3) =

If you could answer these your a life saver