Difference between revisions of "2024 AMC 8 Problems/Problem 10"
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| + | ==Problem== | ||
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| + | 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. | ||
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| + | (A) <math>399</math> (B) <math>414</math> (C) <math>420</math> (D) <math>444</math> (E) <math>459</math> | ||
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| + | ==Solution 1== | ||
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| + | This is a time period of <math>50</math> years, so we can expect the ppm to increase by <math>50*1.515=75.75~76</math>. | ||
| + | <math>76+338=</math>(B) \boxed{414}$. | ||
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==Video Solution 1(easy to digest) by Power Solve== | ==Video Solution 1(easy to digest) by Power Solve== | ||
https://youtu.be/16YYti_pDUg?si=T3FZAZoeeL5NP3yR&t=411 | https://youtu.be/16YYti_pDUg?si=T3FZAZoeeL5NP3yR&t=411 | ||
Revision as of 17:18, 25 January 2024
Problem
In January 1980 the Mauna Loa Observatory recorded carbon dioxide (CO2) levels of 338 ppm (parts per million). Over the years the average CO2 reading has increased by about 1.515 ppm each year. What is the expected CO2 level in ppm in January 2030? Round your answer to the nearest integer.
(A) 
(B) 
(C) 
(D) 
(E) 
Solution 1
This is a time period of 
years, so we can expect the ppm to increase by 
.
(B) \boxed{414}$.
