Answer :
Final answer:
The correct equation for the population of the second bacterial sample after t days, starting with the same initial amount and doubling every 10 days, is P(t) = 20000 * 2^(t/10).
Explanation:
The student is asking about an exponential growth model for bacteria population. The population of the first sample doubles every 10 days, and they start working with a second sample after 7 days with the same initial amount. Based on the context of exponential growth, the growth rate is applied from the point the second sample starts, not from when the first sample was begun. Therefore, the correct equation for the population of sample 2 after t days is P(t) = 20000 × 2(t/10) which corresponds to option 1.