A student carries out an investigation on a strain of bacteria that is used to decompose oil spills. She keeps all the solution in a lighted incubator at a temperature of 22 degree C. After three days she removes the samples and counts the number of bacteria in each. which question is the student investigating?

Many organizations release indexes used to measure the development of the world's countries. as we learned in this lesson, these indexes measure many factors, from life expectancy to happiness. in your opinion, what are the three most important factors we can use to determine how developed a country might be? explain your answers in a few sentences.