Math math pls help pls

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 +"

Christina can paint 420 square feet in 105 minutes. which unit rate describes the scenario?

Need asap. solve for the following inequality