OpenStax, Elementary Algebra 2e §10.3 Solve Quadratic Equations Using the Quadratic Formula · Exercise 41 · Algebra · Quadratics
Solve Quadratic Equations Using the Quadratic Formula · Exercise 41
A flare is fired straight up from a ship at sea. Solve the equation for , the number of seconds it will take for the flare to be at an altitude of 640 feet.
OpenStax, Elementary Algebra 2e · §10.3 Solve Quadratic Equations Using the Quadratic Formula · Exercise 41
Stuck? A gentle nudge
No hints for this one.
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.