Question

the u.s. weather bureau has a station on mauna loa in hawaii that has measured carbon dioxide levels since 1959. at that time, there were 314 parts per million of carbon dioxide in the atmosphere. in 2005, the figure was 379 parts per million. find the increase in carbon dioxide levels and the percent of increase. round to the nearest tenth of a percent.

increase carbon dioxide levels: parts per million

percent increase: %

question help: video message instructor

Explanation:

Step1: Calculate the increase in CO2 levels

Subtract the initial level from the final level.
$379 - 314=65$

Step2: Calculate the percent increase

Use the formula $\text{Percent Increase}=\frac{\text{Increase}}{\text{Initial Value}}\times 100\%$.
$\frac{65}{314}\times 100\% \approx 20.7\%$

Answer:

Increase carbon dioxide levels: 65 parts per million
Percent increase: 20.7%