En un año se otorgará uno de 4 premios (a la investigación, la enseñanza, el servicio y la vinculación) a algunos de los estudiantes, de un grupo de 40, de posgrado del departamento de estadística. Si cada estudiante puede recibir un premio como máximo. ¿Cuántas selecciones posibles habría?

According to the law of conservation of mass, in a chemical reaction the total starting mass of all the reactants equal the total final mass of all the products. true or false?

What type of nuclear decay causes the atomic number of an element to increase by 1?

In which situation has the independent variable for the experiment been changed? check all that apply. changed from counting the number of duckweed at day 0 and day 14 to counting them every day changed from testing duckweed growth in beakers to testing duckweed growth in large outdoor tanks changed from testing the effect of ph on duckweed growth to testing the effect of light levels on duckweed growth changed from testing the effect of acid ph on duckweed growth to testing the effect of basic ph on duckweed growth