What is the answer to 5+10 im really struggling here guys

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 +"

Inez has a phone card. the graph shows the number of minutes that remain on her phone card a certain number of days.

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?