In 1950 the number of retirees was approximately 150 per thousand people aged 20-64. In 1990 this number rose to approximately 200, and it is projected to rise to 275 in 2020. Model N is a piecewise linear function of the time t in years since 1950, and use your model to project the number of retirees per thousand people aged 20-64 in 1965. (Round your answer to the nearest integer.) O 152 people per thousand O 219 people per thousand O 203 people per thousand 169 people per thousand

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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.