It is 5913.36. You have to multiply all of them together except that you have to turn the percent to a decimal before multiplying.
Make a proportion to find the percent:
25/64 = x/100
Multiply 25 and 100, then divide that answer by 64. Then add a percent symbol.
25*100 =2500
2500/64 = 39.0625
39.0625%
Answer: The horizontal asymptote y = 10 means that the final concentration will always be greater than 10%.