PARA EVITAR UMA EPIDEMIA, A SECRETARIA DE SAÚDE DE UMA CIDADE DEDETIZOU(...) | QUADRÁTICA OU 2º GRAU

Improve your school grades or guarantee your college entrance exam approval by paying R$ 1.33 per day. Become an Explicaê Premium student and get access to all the content for Elementary and High School. https://explicae.com.br/?utm_source=y... Use the coupon: EXPRESOLVE and get 20% off any plan: https://explicae.com.br/?cupom=expres... ___ Welcome to Explicaê Resolve Enem! Now you can follow all the solutions to the Enem questions along with the Exquad teachers! Find your question in the following notebooks: IN OUR SURVIVAL MANUAL: SUBJECT: 3 FUNCTIONS | 3.3 QUADRATIC OR 2ND DEGREE _______________________________ QUESTION 2 5 (ENEM 2016 2nd APPLICATION) To avoid an epidemic, the Health Department of a city fumigated all neighborhoods, in order to prevent the proliferation of the dengue mosquito. It is known that the number f of infected people is given by the function f(t) = -2t² + 120t (where t is expressed in days and t = 0 is the day before the first infection) and that this expression is valid for the first 60 days of the epidemic. The Health Department decided that a second fumigation should be done on the day the number of infected people reached 1,600, and a second fumigation needed to happen. The second fumigation began on the A 19th day. B 20th day. C 29th day. D 30th day. E 60th day. _______________________________ Still don't know our Survival Guide for the ENEM exam? We have all the ENEM exams separated by subject and topic, a review checklist, an annual schedule of mock exams and reviews, and much more!!! Oh… I forgot to mention that our material has Explicaê quality – super well-designed and organized for you! Use coupon code EXPRESOLVE and get 20% off any plan. Join the EXQUAD by following our social media: Instagram: https://www.instagram.com/explicaeofi... Facebook:   / explicaeoficial   YouTube:    / @chegae   LinkedIn:   / explicae   Twitter: explicaeoficial