Pls ? : ) i'm having a difficult time

The ratio of two numbers is 5 to 4. the sum of the numbers is 99. what number is the greater of the two numbers?

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 +"

The zoo collects $9.60 for every 24 tickets sold. how much will be collected for 400 tickets?