Solve 2v^2-90=0, where v is a real number

The diagram below shows the different phase transitions that occur in matter. which arrow represents the transition in which dew is formed?

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

Is powdered sports drink ionic or covalent ? 10pts !