The temperature in the freezer is \( -155^{\circ} \mathrm{C} \) The temperature in the fridge is \( 4^{\circ} \mathrm{C} \)

(1 point) Monday's lecture went over a logistic equation: \( f(t)=\frac{1000}{1+999 e^{-0.603 t}} \) which models how many people \( f \) have had the flu \( t \) days after an initial infection in a community of 1000 people. According to the model, how many people will have had the flu after 10 days? \( \square \) According to the model, how many people will have had the flu after 20 days? \( \square \) According to the model, how many days until 500 people have had the flu? \( \square \) According to the model, how many days until 700 people have had the flu? \( \square \) According to the model, how many days until 2000 people have had the flu? \( \square \) Hint: One of your answers should be "never"

What was a successful oivilization able to provide?

Which expression is equivalent to \( \frac{3 \sqrt{20}}{\sqrt{54}} \) ?

18. Cuatro profesores A, B, C y D se encuentran a diferentes distancias del parlante, el cual emite a 25.000 W de potencia, como se muestra en la figura derecha. ¿Cuál es la intensidad con la que cada profesor percibe el sonido producido por el parlante?

\( \begin{aligned} \text { f. } & \frac{2(x+4)}{3}-\frac{y}{2}=\frac{9}{2} \\ x+2 y-\frac{1}{3}(3 x-2) & =-\frac{4}{3}\end{aligned} \)