选择题

2024 AMC 8 Problem 10: CO₂ Levels

In January 1980 the Mauna Loa Observatory recorded carbon dioxide (CO₂) levels of 338 ppm (parts per million). Over the years the average CO₂ reading has increased by about 1.515 ppm each year. What is the expected CO₂ level in ppm in January 2030? Round your answer to the nearest integer.

2024 AMC 8 第10题:二氧化碳水平

1980 年 1 月,莫纳罗亚天文台记录的二氧化碳 (CO2) 水平为 338 ppm(百万分之一)。多年来,二氧化碳平均读数每年增加约 1.515 ppm。 2030 年 1 月的预期二氧化碳浓度(ppm)是多少?将您的答案四舍五入为最接近的整数。

A.
399
B.
414
C.
420
D.
444
E.
459