A certain bacteria multiply exponentially at a rate of 8% per day. If 2 bacteria exist initially, how many will be present after 25 days?

After 25 days will be present about 13.70 ≅ 13 bacteria

Step-by-step explanation:

The form of the exponential function is y = a , where

∵ A certain bacteria multiply exponentially at a rate of 8% per day

→ Assume that y is the number of bacteria, x is the number of days

∴ r = 8% = = 0.08

∵ 2 bacteria exist initially

∴ a = 2

→ Substitute them in the form of the equation above

∵ y = 2

∴ y = 2

∵ x = 25

→ Substitute x in the equation by 25

∴ y = 2

∴ y = 13.69695

∴ After 25 days will be present about 13.70 bacteria

Note: The number of bacteria must be the whole number so the answer should be 13 bacteria will be present after 25 days.

answer: 1inch=7days  

12inch=12*7=84days

step-by-step explanation: