PLEASE HELP WITH MY CHEMISTRY PLZ The carbon dioxide concentration in the atmosphere was 282 parts per million (ppm) in the year 1750.
In the year 2010, this increased to 387 ppm. Calculate the percentage increase in carbon dioxide
concentration over this period of time. Round your answer to the nearest whole number.

How do you lengthen a pattern piece? (family and consumer science, sewing)

What is the ph of a 0.0010 m hno3? 1.0 3.0 4.0 5.0

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