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.

Its source prints no answer for this problem, so there's nothing to check against.

~8 minWritten answer · compare with the solution

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

Stuck? A gentle nudge

No hints for this one.

Something off?

Workspace

Your working

Check your full solution

Upload photos of your handwritten work or a PDF, and Lemma will read it and tell you whether it's right — and where it first goes wrong if not.