OpenStax, Algebra and Trigonometry 2e §2.5 Quadratic Equations · Exercise 70 · Algebra · Quadratics

Quadratic Equations · Exercise 70

An epidemiological study of the spread of a certain influenza strain that hit a small school population found that the total number of students, $P$ , who contracted the flu $t$ days after it broke out is given by the model $P = - t^{2} + 13 t + 130,$ where $1 \leq t \leq 6.$ Find the day that 160 students had the flu. Recall that the restriction on $t$ is at most 6.

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OpenStax, Algebra and Trigonometry 2e · §2.5 Quadratic Equations · Exercise 70

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