Short Answer/Essay Note: Your teacher will grade your responses to questions 18–20 to ensure that you receive proper credit for your answers.
Compare and contrast spiral and elliptical galaxies. (Make at least 2 comparisons.)

What is the mass of 4 molecules of co2

The yearly amounts of carbon emissions from cars in belgium are normally distributed with a mean of 13.9 gigagrams per year and a standard deviation of 5.8 gigagrams per year. find the probability that the amount of carbon emissions from cars in belgium for a randomly selected year are between 11.5 gigagrams and 14.0 gigagrams per year. a. 0.340 b. 0.660 c. 0.167 d. 0.397

Acontrol during an experiment. might change remains constant does not exist does change