en la ciudadela de soacha de ciudad verde se identifico que el 60% de las familias residentes tienen vehiculo propio. si se desea realizar una investigacion de mercado con dicha poblacion sobre consumo de gasolina. cual debe ser el tamaño de la muestra teniendo en cuenta un nivel de confianza del 95% y de error de 0.03?

Arley is building a model of a city map. in one part of the city, three roads form a right triangle, which harley draws as triangle abc, with the following measures: m∠b=90° and m∠a=30°. in his scale model, the hypotenuse of triangle abc, ac¯¯¯¯¯¯¯¯, has a length of 817−−√ cm. what is the value of a (the length of bc¯¯¯¯¯¯¯¯)?

Solve this problem! extra ! 3025/5.5 = a/90.75 / = fraction

Ana earns 2.5% simple interest on $2,000 in her savings account. she does not make any deposits or withdrawals. after 3 years, how much interest will ana have earned on her savings account?