The country of Transylvania contains 2.3 million people and covers 800 square miles. In the year after the last census, there were 109,000 new children born and 111 000 people died.

What is the population's growth rate and, in how many years will the population of Transylvania double?

(this was an assignment as part of the population unit, that my biology teacher assigned me)

Mars and earth have quite a few things in common. both are  terrestrial planets, both are located within the sun’s  habitable zone, both have  polar ice caps, similarly  tilted axes, and similar  variations in temperature. and according to some of the latest scientific data obtained by rovers and atmospheric probes, it is now known that mars once had a  dense atmosphere  and was covered with  warm, flowing water.