[填空题]
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A population of goats on an island starts at 232. The population is expected
to increase by 15 % each year.
1.Find the expected population size after:
1.1. 10 years;
$u_{10}$=
1.2. 20 years..
$u_{20}$=
Find the number of years it will take for the population to reach 15000.
n≈ .