Charles Keeling’s work at the National Oceanic and Atmospheric Administration (NOAA) Mauna Loa Observatory paved the way to understanding how human activities can lead to global warming. Which greenhouse gas did Charles Keeling measure at the observatory?
A)carbon monoxide
B)methane
C)nitrous oxide
D)carbon dioxide

The correct answer would be b

The correct answer is amu.

Here is your answer:                                                                                                                                                                                                                                                   formula for volume: base*width*height=                                                                                                 5*2*10=100                                                                                   your answer is 100cm.