A bird species in danger of extinction has a population that is decreasing exponentially (A=A, ek). Seven years ago the population was at 1800 and today only 1000 of the birds are alive. Once the population drops below 100, the situation will be irreversible. When will this happen? The population will drop below 100 birds approximately years from now. (Do not round until the final answer. Then round to the nearest whole number as needed.)

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Differential Equations

Have you ever observed the movement of the satellites and rockets or how the planets go around the sun in their orbits? How will you determine their motion? Definitely they follow some scientific laws and these kinds of problems are framed as differential equations.