Human beings have always had ideas about what cause earthquakes. The influential ancient Greek philosopher Aristotle suggested that winds trapped in underground caves pushed on the cave roofs, resulting in minor earth tremors. He believed large earthquakes occurred when a vast amount of air was trapped underground and then abruptly released to the surface. Aristotle's misconceptions led to the belief in "earthquake weather," and that belief was reinforced by others, who suggested that strong winds, fireballs, and meteors along with calm and cloudy weather conditions was a pattem predictive of earthquakes. Early \( 21^{\text {st }} \) century scientific research has shown that earthquakes occur in all types of weather. There is, however, some data to suggest that when a low-pressure system accompanies a major storm, the probability of an earthquake occurring in the earth's crust does slightly increase. According to the passage, which of the following statements is correct? A Some data suggest earthquakes often occur during calm and cloudy weather. C Recent findings suggest people can accurately predict earthquakes based on weather conditions. D Historical research shows people believed earthquakes were caused by the build-up and release o pressure.

1. Escreva no caderno o valor dos logan \( \begin{array}{ll}\text { a) } \log _{9} 1 & \text { d) } 5^{\log _{5} 7} \\ \text { b) } \log _{8} 8 & \text { e) } \log _{\sqrt{10}} \sqrt{1} \\ \log _{\frac{1}{10}}\left(\frac{1}{10}\right)^{3} & \text { f) } \log _{\frac{1}{3}} 3^{5}\end{array} \)

Translate the sentence into an Inequality. Four increased by the product of a number and 5 is at least -26 .

1. Una escuela de nivel medio superior tiene un ingreso de alumnos en el año 2008 comi se muestra en la gráfica. Con base en estos datos, ¿Cual es la media del grupo?

112 Matteo e Antonio abitano ai capi opposti di via Cavour, una delle vie principali della loro città lunga 800 m. Decidono di incontrarsi. Matteo procede con velocità di \( 2,0 \mathrm{~m} / \mathrm{s} \) e Antonio con velocità \( 2,2 \mathrm{~m} / \mathrm{s} \) nel verso oppo- sto. Antonio, trattenuto da una telefonata, parte con 10 s di ritardo. Scrivi le leggi orarie del moto di Matteo e Antonio. Calcola l'istante in cui s'incontrano e quale distanza hanno percorso. Disegna i grafici spazio-tempo e velocità-tempo. \( \left[\begin{array}{l}\mathrm{M} \\ =(2,0 \mathrm{~m} / \mathrm{s}) t ; s_{\mathrm{A}}=800 \mathrm{~m}-(2,2 \mathrm{~m} / \mathrm{s}) \times(t-10 \mathrm{~s}) ; 2,0 \times 10^{2} \mathrm{~s} ; \\ \left.4,0 \times 10^{2} \mathrm{~m}\right]\end{array}\right. \)

1. Una aerolínea ofrece 4 vuelos diarios para viajar de la ciudad \( A \) a la ciudad \( B \) y 4 vuelos diarios para viajar de la ciudad \( B \) a la A. una aerolínea internacional ofrece 2 vuelos diarios para viajar de la ciudad \( A \) a la B y 2 vuelos diarios para viajar de la ciudad B a la A. ¿ Cuántas formas diferentes existen para volar de la ciudad \( A \) a la ciudad B?