Nathan was assigned the task of calculating the density of a substance. he measured the volume and found it to be 300cm3. the mass of the substance was 520g. what was the density?
a. 2.0g/cm^3
b. 1.7g/cm^3
c. 1.0g/cm^3
d. 0.7 g/cm^3
e. 1.9 g/cm^3

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