De un terreno e 19 hectareas 4 1/2 hectareas se dedican alcultivo de trigo 7 3/4 hectareas al cultivo de frijol y el resto al cultivo de maiz ¿cuantas hectareas se dedican al cultivo de trigo y frijol? Y ¿cuantas hectareas se dedican al cultivo de maiz

The decibel level of sound is 50 db greater on a busy street than in a quiet room where the intensity of sound is watt/m2. the level of sound in the quiet room is db, and the intensity of sound in the busy street is watt/m2. use the formula , where is the sound level in decibels, i is the intensity of sound, and is the smallest sound intensity that can be heard by the human ear (roughly equal to watts/m2).

Human body temperatures have a mean of 98.20° f and a standard deviation of 0.62°. sally's temperature can be described by z = 1.4. what is her temperature? round your answer to the nearest hundredth. 99.07°f 97.33°f 99.60°f 100.45°f

Solve each quadratic equation by factoring and using the zero product property. [tex]x^2+6x+8=0[/tex]