Answer:
2) Imagine that x (weeks) is the number of weeks it takes for both of them to have the same amount of money:
We have the equation:
435 + 25x = 875 - 15x
25x + 15x = 875 - 435
40x = 440
x = 440/40 = 11 (weeks)
3) Since we have 2500 bacteria at the start and the number of the bacteria will tripple every month, we have:
The number of bacteria after 10 month is:
2500 + 2500 . 3^10
= 2500 + 2500 . 59049
= 147,625,000
