Option B
The amount of mice when t = 0 is 300
Solution:
Given that population of mice grows according to the formula:

where t is measured in months
To find: amount of mice when t = 0
So we have to substitute t = 0 in given formula and find value of A(t)

Substitute t = 0


So we get,

Thus the amount of mice when t = 0 is 300