2024 AMC 8

Complete problem set with solutions and individual problem pages

Problem 10 Easy

In January the Mauna Loa Observatory recorded carbon dioxide levels of ppm (parts per million). Over the years the average reading has increased by about ppm each year. What is the expected level in ppm in January ? Round your answer to the nearest integer.

Answer:B

Solution 1

This is a time period of years, so we can expect the ppm to increase by ppm. Since we started with ppm, we have .

Solution 2

years. The ppm level in 2030 is .