Después de una inundación, el departamento de bomberos de una ciudad utiliza tres bombas para drenar agua de los sótanos inundados. Las tres bombas pueden drenar toda el agua de un sótano inundado en 6horas, 5 horas y 4 horas respectivamente. Si las encienden simultáneamente ¿en cuánto tiempo logran vaciar el sótano?

In a sample of 200 residents of georgetown county, 120 reported they believed the county real estate taxes were too high. develop a 95 percent confidence interval for the proportion of residents who believe the tax rate is too high. (round your answers to 3 decimal places.) confidence interval for the proportion of residents is up to . would it be reasonable to conclude that the majority of the taxpayers feel that the taxes are too high?

Suppose i flip two identical coins. what is the probability that i get one head and one tail?

Acomputer store buys a computer system at a cost of $370.80. the selling price was first at $ 618, but then the store advertised a 20 % markdown on the system. answer parts a and b. a. find the current sale price.