Un obrero trabaja en altura, para ello emplea una escalera de aluminio recta de extensión (ver imagen). El pie de la escalera la apoya en el piso a una distancia de 2.3 m de la pared, formando así, un ángulo con respecto al piso de 66.9o, ¿Qué altura (en metros) alcanza el obrero? Y ¿Qué largo tendría la escalera en metros?

The first few steps in solving the quadratic equation 9x2 + 49x = 22 ? 5x by completing the square are shown. 9x2 + 49x = 22 ? 5x 9x2 + 54x = 22 9(x2 + 6x) = 22 which is the best step to do next to solve the equation by completing the square? 9(x2 + 6x + 3) = 25 9(x2 + 6x + 3) = 49 9(x2 + 6x + 9) = 31 9(x2 + 6x + 9) = 103

The two cylinders are similar. if the ratio of their surface areas is 9/1.44 find the volume of each cylinder. round your answer to the nearest hundredth. a. small cylinder: 152.00 m3 large cylinder: 950.02 m3 b. small cylinder: 972.14 m3 large cylinder: 12,924.24 m3 c. small cylinder: 851.22 m3 large cylinder: 13,300.25 m3 d. small cylinder: 682.95 m3 large cylinder: 13,539.68 m3

Which radical expression is a rational number? a. √ 360 b. √ 644 c. √ 225 d. √ 122